Helmets

An aerodynamic road bike helmet that is undeniably fast, yet surprisingly light, cool, and comfortable. Less wind. More win. When speed is your top priority and every watt counts, reach for the helmet that'll cut through the wind to save you seconds. Ballista is Trek's fastest, most aerodynamically-advanced helmet. Ballista is light, cool, comfortable, and engineered with a fully-integrated Mips Air safety system that's designed to help keep you safer. Product details: - Trek's fastest, most aerodynamic helmet will save big watts and shave crucial seconds - An excellent ventilation system makes this aero helmet surprisingly cool and comfortable - The Mips Air system is light, cool, and designed to help reduce rotational forces - The single-lace BOA® fit system is fully adjustable to provide a custom, 360° fit - Rubberized sunglasses docking port provides secure and easy-to-use storage - Beveled front edge improves field of view while riding on the hoods and in the drops - 5-STAR Virginia Tech safety rating - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over

The Blaze WaveCel Mountain Bike Helmet is like two helmets in one, with removable 3/4 coverage that lets you choose additional ear protection or the cooler, lighter look and feel of a more traditional half-shell. Either way you get a full set of features and 5-star safety tech with lighter and cooler WaveCel. Dial in the perfect fit with a BOA® Fit System, lay-flat camlock strap dividers, and Fidlock buckle. Additional features include a goggle optimized three-position magnetic breakaway visor with secure sunglass storage and a removeable Blendr mount for a Trek light or GoPro. Product details: - 5-star safety rating from Virginia Tech with lighter and cooler WaveCel technology - Removable 3/4 side coverage and extra deep rear coverage - Front vents and channel system with 10% larger cells for more airflow and efficient cooling - Excellent fit and comfort via BOA® fit system, lay-flat camlock strap, and Fidlock strap buckle - Goggle optimized three-position visor features magnetic breakaway and integrated sunglass storage - Removable Blendr magnetic mount system easily integrates a GoPro camera or Trek lights - Crash Replacement Guarantee provides a free replacement in the event of a crash within the first year of ownership - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 5 and over

A helmet with big kid features for smaller riders. TODDLERS NEED HELMETS, TOO Designed to help protect the young cyclist in your life, the Little Dipper toddler helmet features a built-in visor and easy-to-use magnetic buckles with a kid-friendly fit. It's perfect for little ones riding in a trailer, a child carrier, or all on their own. PRODUCT DETAILS - In-molded EPS shell with full coverage designed for protection and durability - Fidlock magnetic buckle fastens effortlessly for a quick, kid-friendly fit - Soft, removable helmet pads that are easy to clean - Dialed fit system provides a secure and comfortable fit - Adjustable helmet straps provide a clean look with easy fit management - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership - Helmet meets ASTM standards—their tests use a smaller mass headform that's more realistic to younger riders - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over Size Circumference - Toddler: 46 - 50 cm/18" - 20"

The Rally WaveCel Mountain Bike Helmet is 5-star rated by Virginia Tech and features updated, lighter, and cooler WaveCel safety tech. You'll love how easy it is to dial in the perfect fit with a BOA® Fit System, lay-flat camlock straps, and a Fidlock magnetic buckle. Plus, the goggle friendly three-position visor has built-in sunglass storage and the removable Blendr mount makes it easy to mount a Trek light or GoPro. Plus, the deeper rear coverage offers additional protection, and two front-facing vents are strategically placed to offer more airflow to make Rally WaveCel feel cooler and look the part as well. Product details: - 5-star safety rating from Virginia Tech with lighter and cooler WaveCel technology - Deeper rear coverage provides added protection - Front vents and channel system with 10% larger cells for more airflow and efficient cooling - Excellent fit and comfort via BOA® fit system, lay-flat camlock strap, and Fidlock strap buckle - Goggle compatible three-position visor with built-in sunglass storage - Removable Blendr magnetic mount system easily integrates a GoPro camera or Trek lights - Crash Replacement Guarantee provides a free replacement in the event of a crash within the first year of ownership - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 5 and over

A comfortable, versatile helmet with clean aesthetics and the added protection of Mips. - Mips safety system helps provide additional protection from rotational forces in the event of certain cycling-related accidents - Refined styling with removable visor easily transitions from road to trail - Large vents and recessed channeling keep you cool on warm days - Trek Headmaster 3 fit system provides simple and secure adjustability with just one hand - Soft, comfortable helmet pads wick moisture and are easy to wash after a full day of fun

A fun, comfortable kids' helmet that looks great and features the added protection of Mips. Details: - Mips safety system - Fun, kid-friendly looks with a removable visor - Large vents and recessed channeling help kids keep a cool head - Trek Headmaster 3 fit system provides simple and secure adjustability with just one hand - Soft, comfortable helmet pads wick moisture and are easy to clean - Crash Replacement Guarantee provides free helmet replacement if involved in a crash within the first year of ownership - One Size: 50 - 55cm / 20" - 22"

A stylish road helmet with advanced WaveCel technology that balances comfort and performance for all riders who value safety. A MAJOR ADVANCEMENT IN THE PROTECTION AGAINST CYCLING-RELATED HEAD INJURIES Starvos WaveCel is a versatile, high-value cycling helmet for new-to-seasoned riders who want WaveCel, a leading technology in the protection against cycling-related head injuries. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Trek-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. PRODUCT DETAILS - WaveCel advanced helmet technology - Intuitive, one-handed Headmaster fit system makes adjustments easy - LockDown dividers make helmet strap management clean and easy to adjust - Soft, comfortable, and moisture-wicking washable helmet pads - Available in XS and XL sizing - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over

A stylish road helmet with WaveCel technology designed for riders who prioritize safety and require a fit designed for a rounder head. - WaveCel advanced helmet technology - Intuitive, one-handed Headmaster fit system makes height and circumference adjustments easy - LockDown dividers make helmet strap management clean and easy to adjust - Soft, comfortable, and moisture-wicking washable helmet pads - Round fit sizing designed to accommodate rounder head shapes - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership

If you get just one helmet, make it this one Whether your finish line is on the race course or your front door, Trek Circuit WaveCel delivers the performance, comfort and tech to be your go-to helmet. It's equipped with features that any rider will appreciate, like WaveCel technology, a BOA® Fit System and Blendr mount systems. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Trek-exclusive technology disrupts the safety standards that the industry has accepted for over 30 years. Product details: - WaveCel advanced helmet technology - The BOA® Fit System lets you easily secure and adjust your fit with one hand - The Blendr magnetic mount system easily integrates a GoPro camera and Bontrager lights - Made of 50% post-consumer recycled polystyrene - FlatStrap semi-fixed strap dividers lay flush and move fore and aft for a perfect fit - Soft, comfortable, moisture-wicking, and washable helmet pads - Reflective elements on the back of the helmet offer enhanced visibility - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 5 and over

A value-packed helmet perfect for kids who just want to hop on their bike and ride. READY TO RIDE WITH THE GROWN-UPS The Trek Tyro is a dedicated youth helmet packed with the same performance and comfort found in adult helmets. A Fidlock magnetic buckle lets kids secure the chin strap easily, and an simple-to-adjust dial fits a wide range of head sizes. Plush pads make the helmet comfortable for a full day on the bike. PRODUCT DETAILS - In-molded EPS shell with additional rear coverage for protection and durability - Fidlock magnetic buckle fastens effortlessly for a quick, kid-friendly fit - Dialed fit system provides a snug and comfortable fit - Soft, comfortable, moisture-wicking, and washable helmet pads - Adjustable helmet straps provide a clean look and easy fit management - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership - Helmet meets ASTM standards-their tests use a smaller mass headform more realistic to younger riders - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over

An all-around, road racing helmet that is light, cool, fast, and features the added protection of Mips Light is fast. Fast is cool. Velocis Mips is now lighter, cooler, and faster than ever thanks to insight and feedback from Lidl-Trek. Add in a full suite of pro-level features and you have a helmet bound for the podium. Velocis also keeps protection front and center, featuring a fully-integrated Mips Air safety system designed to provide additional protection from rotational forces. PRODUCT DETAILS - Trek's lightest road helmet is now even lighter, saving grams and providing more comfort - Improved ventilation and channeling keeps you cooler and moves you faster - The Mips Air system is light, cool, and designed to improve comfort and protection - The single-lace BOA® fit system is fully adjustable to provide a custom, 360° fit - Rubberized sunglasses docking port provides secure and easy-to-use storage - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership - 30-Day Unconditional Guarantee allows you to return your helmet if you're unsatisfied for any reason - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 5 and over

An all-around, road racing helmet that is light, cool, fast, and features the added protection of Mips. Light is fast. Fast is cool. Velocis Mips is now lighter, cooler, and faster than ever thanks to insight and feedback from Trek-Segafredo. And with a full suite of pro-level features, this helmet is bound for the podium. Velocis is designed with protection front and center. This helmet earned a Virginia Tech 5-STAR safety rating and features a Mips Air safety system. Product details: - Trek's lightest road helmet is now even lighter, saving grams and providing more comfort - Improved ventilation and channeling keeps you cooler and moves you faster - The Mips Air system is light, cool, and designed to improve comfort and protection - The single-lace BOA® fit system is fully adjustable to provide a custom, 360° fit - Rubberized sunglasses docking port provides secure and easy-to-use storage - Beveled front edge improves field of view while riding in the drops and on the hoods - 5-STAR Virginia Tech safety rating - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over Trek Velocis Mips – Light, fast, cool Designed to meet the everyday demands of Trek-Segafredo, Velocis is a versatile helmet that excels anywhere you ride. It’s lighter, cooler, and faster than ever before and, with added tech like the Mips Air safety system, a customizable BOA® fit system, and secure sunglasses storage, you’ll be ready for an epic day in the mountains or chasing local KOMs.

Aggressive Styling In Our Most Affordable DH-Certified Helmet Our Rampage Helmet features a lightweight, injection-molded ABS shell inspired by our iconic Rampage Pro Carbon Helmet. Large vents provide superior airflow for all-day comfort. The fully adjustable visor and quick release buckle add big-mountain function to this full-face MTB helmet. - Proven MIPS impact protection system reduces rotational forces in a crash - Lightweight, injection-molded ABS shell - Inspired by our podium-proven Rampage Pro Carbon - Mesh vent screens provide ventilation while filtering dirt and debris - D Ring closure - Adjustable visor CERTIFICATIONS - CPSC - EN 1078AS/NZS 2063 - ASTM 1952-15 downhill - ASTM 2032-15 BMX

Proven MIPS coverage for superior open-face performance - MIPS' added protection system has been proven to reduce the rotational motion when implemented in a helmet by absorbing and redirecting energies and forces otherwise transmitted to the brain - Optimized venting with channeled, in-molded EPS provides efficient cooling - Goggle compatible, 3 position adjustable visor - Removable, washable moisture wicking liner - 360°Fit System allows you to dial in your perfect fit every ride - EPS, PC, PA, Polyester

The Speedframe MIPS Helmet has premium features usually meant for much more expensive helmets. A MIPS liner, goggle compatible 3-position visor, and our 360-degree fit make the Speedframe one of the best values in an open-face mountain bike helmets. Add in the legendary aggressive Fox design DNA, and you have one of the most shred-ready mtb helmets in the market today. - Proven MIPS impact protection system reduces rotational forces in a crash - Removable, washable moisture-wicking comfort liner - Optimized venting with channeled, in-molded EPS provides efficient cooling - Goggle compatible 3-position adjustable visor - 360 fit system allows you to dial in your perfect fit every ride - Note: Avoid exposure to aerosol sprays like bug repellent and sunscreens as they can cause your helmet's finish to peel - Weight: 360 g, medium

Proven MIPS Coverage for Superior Open-Face Performance The Speedframe MIPS Helmet has premium features usually meant for much more expensive helmets. A MIPS liner, goggle compatible 3-position visor, and our 360-degree fit make the Speedframe one of the best values in an open-face helmet. Add in the legendary aggressive Fox design DNA, and you have one of the most shred-ready trail helmets in the market today. Features - Proven MIPS impact protection system reduces rotational forces in a crash - Removable, washable moisture-wicking comfort liner - Optimized venting with channeled, in-molded EPS provides efficient cooling - Goggle compatible, 3-position adjustable visor - 360 Fit System allows you to dial in your perfect fit every ride - Weight: 360g Sizing - Small = 51 – 55cm - Medium = 55 – 59cm - Large = 59 – 63cm Certifications - CPSC - EN 1078 - AS/NZS 2063

A trail-tested mountain bike helmet with advanced WaveCel technology for comfort and protection on any trail, any time. A major advancement in the protection against cycling-related head injuries When you're riding serious trails, you need serious protection. Blaze WaveCel offers Bontrager's best in performance and protection on any trail, from flowy singletrack to gnarly downhills. It’s built for style, comfort, and performance, and equipped with WaveCel for whatever trails you roam. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. Product details - WaveCel advanced helmet technology - BOA® Fit System lets you easily secure and adjust helmet fit with just one hand - Fidlock magnetic buckle fastens effortlessly for a quick, secure fit - Front Blendr mount system easily integrates GoPro camera and Bontrager light accessories - Additional NoSweat pad with silicone channel keeps sweat out of eyes for constant clarity - Drop-in coverage on back of helmet offers extended protection - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership

Easily integrated Designed specifically for specific Bontrager Rally MIPS mountain bike helmets, the Blendr mount easily integrates Bontrager Ion lights and GoPro cameras. - Quickly mount light and camera accessories on top of your Bontrager Rally MIPS mountain bike helmet - Tested with accelerometer for intended breakaway point if involved in a crash

Quickly mount light and camera accessories on top of your Bontrager MTB helmet. - Quickly mount light and camera accessories on top of your Lithos helmet - Tested with accelerometer for intended breakaway point if involved in a crash

Ultra-versatile helmet that is light, cool, and sleek with the added protection of WaveCel advanced helmet technology and the convenience of magnetic light mounts. If you're going to get just one helmet, make it this one Whether your finish line is on the race course or at your front door, Bontrager's Circuit WaveCel delivers the right performance, comfort, and tech to be your go-to helmet for any ride. It's equipped with features any rider will appreciate on any terrain, like WaveCel technology, a BOA Fit System for superior comfort and security, and the Blendr mount system for easy light and camera integration. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. Product details - WaveCel advanced helmet technology - BOA Fit System lets you easily secure and adjust your fit with one hand - Blendr magnetic mount system easily integrates a GoPro camera and Bontrager lights - Made of 50% recycled EPS material - FlatStrap semi-fixed strap dividers lay flush and move fore and aft for a perfect fit - Soft, comfortable, moisture-wicking, and washable helmet pads - Reflective elements on the back of the helmet offer enhanced visibility - Crash Replacement Guarantee provides free replacement if your helmet is impacted in the first year of ownership

Add the safety of visibility to your helmet and light up the trail, road, or commute with help from the Bontrager Helmet Mount. Easily attaches a light to most helmets. - Works with all Bontrager Ion and Flare lights

A stylish kids' helmet with WaveCel, a leading helmet technology in the protection against cycling-related head injuries. A major advancement in the protection against cycling-related head injuries Safety has never looked so cool. Jet is a kids' bike helmet with skater-inspired style, proven WaveCel protection, and a parent-approved price. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. Product details - WaveCel advanced helmet technology - Meets ASTM standards, whose tests use a smaller mass headform more realistic to younger riders - Fidlock magnetic buckle fastens easily for a quick, secure, kid-friendly fit - Comes with a free sticker kit - Dialed fit system provides a secure and comfortable fit - Soft and thick helmet pads are removable for easy cleaning - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Specifications - Size (head circumference): Universal Youth (50 – 55cm) - Fit system: HB-80 - Pad material: Moisture-wicking pads - Buckle type: Fidlock buckle - Includes: Crash Replacement Guarantee, stickers - Weight: 540g

Set your little thrill-seeker up for safe success in a helmet outfitted with Multi-directional Impact Protection System (MIPS). Developed by brain surgeons and scientists, MIPS helps reduce rotational forces on the brain caused by angled impacts to the head. - For growing kids, ages 2 – 4 - MIPS Brain Protection System - Fidlock magnetic buckle fastens effortlessly for a quick, secure, kid-friendly fit - Soft, removable helmet pads can easily be cleaned - Dialed fit system provides a secure and comfortable fit - Adjustable helmet straps provide a clean look and easy fit management - Helmet meets ASTM standards, whose tests use a smaller mass headform more realistic to younger riders - Crash Replacement Guarantee provides free helmet replacement if it is involved in a crash within the first year of ownership

An off-road helmet with WaveCel technology that balances comfort and performance for trail riders who value safety. A major advancement in the protection against cycling-related head injuries Rally WaveCel is a high-style, high-value off-road helmet with trail-specific features and WaveCel, a leading technology in the protection against cycling-related head injuries. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. Product details - WaveCel advanced helmet technology - Virginia Tech 5 STAR rating - BOA Fit System lets you easily secure and adjust your helmet fit with one hand - Adjustable visor offers multiple coverage options - Extended back-of-helmet shell offers additional rear protection - LockDown dividers make helmet strap management clean and easy to adjust - Soft, comfortable, moisture-wicking, and washable helmet pads - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Specifications - Size (head circumference): Small (51-57cm) / Medium (54-60cm) / Large (58-63cm) - Fit system: Boa - Pad material: Moisture-wicking pads - Buckle type: Standard buckle - Includes: Crash Replacement Guarantee - Weight: 360g (Small) / 400g (Medium) / 430g (Large)

All-purpose, value-packed helmet balances performance and comfort. Value-packed protection Wear it and believe it. The Solstice is proof you don't have to spend a lot of money to get a great fitting, easy-to-use cycling helmet designed to keep you protected during all your bike riding adventures. Product details - Designed for larger vents and increased airflow while maintaining structural integrity - Built-in and removable visor options give you two choices for constant coverage - Intuitive, one-handed Headmaster fit system adjusts height and circumference - LockDown dividers make helmet strap management clean and easy to adjust - Internal, recessed channels move airflow over your head to keep you cool and dry - Soft, comfortable, moisture-wicking, and washable helmet pads - Crash Replacement Guarantee provides free helmet replacement if it is involved in a crash within the first year of ownership Specifications - Size (head circumference): Small/Medium (51-58cm); Medium/Large (55-61cm) - Fit system: Headmaster II - Pad material: Moisture wicking pads - Buckle type: Standard buckle - Includes: Visor plugs - Weight: 290g (Small/Medium)

A stylish road helmet with advanced WaveCel technology that balances comfort and performance for all riders who value safety. A major advancement in the protection against cycling-related head injuries Starvos WaveCel is a versatile, high-value cycling helmet for new-to-seasoned riders who want the added protection of WaveCel, a leading technology in the protection against cycling-related head injuries. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. Product details - WaveCel advanced helmet technology - Virginia Tech 5 STAR rating - Intuitive, one-handed Headmaster fit system makes height and circumference adjustments easy - LockDown dividers make helmet strap management clean and easy to adjust - Soft, comfortable, moisture-wicking, and washable helmet pads - Available in XL sizing - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Specifications - Size (head circumference): Small (51-57cm) / Medium (54-60cm) / Large (58-63cm) / X-Large (60-66cm) - Fit system: Headmaster II - Pad material: Moisture-wicking pads - Buckle type: Standard buckle - Includes: Crash Replacement Guarantee - Weight: 300g (Small) / 335g (Medium) / 370g (Large) / 385g (X-Large)

Everyday helmet that works for everyday kids who just want to hop on their bike and ride. Protection for your pint-sized cyclist The Tyro is a dedicated children's helmet packed with the same performance and comfort found in adult helmets. A Fidlock magnetic buckle lets kids secure the chin strap easily, and an easy-to-adjust rear dial conforms to a wide range of head sizes. Product details: - In-molded EPS shell with additional rear coverage for protection and durability - Fidlock magnetic buckle fastens effortlessly for a quick, secure, kid-friendly fit - Dialed fit system provides a secure and comfortable fit - Soft, comfortable, moisture-wicking, and washable helmet pads - Adjustable helmet straps provide a clean look and easy fit management - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership - Helmet meets ASTM standards—their tests use a smaller mass headform more realistic to younger riders - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over Features: Additional coverage An in-molded EPS shell along with additional rear coverage provides assurance for the unexpected. Fidlock magnetic buckle A Fidlock magnetic buckle fastens effortlessly for a quick, secure, kid-friendly fit. Simply move the two ends close to each other and watch as they magically connect. Dialed fit A dialed fit system provides a secure and comfortable fit with a wide range of adjustability. Fresh pads Soft, comfortable, moisture-wicking pads provide instant and maintained comfort and are also removable for cleaning.

Everyday helmet that works for everyday kids who just want to hop on their bike and ride. Ready to ride with the grown-ups The Tyro is a dedicated youth helmet packed with the same performance and comfort found in adult helmets. A Fidlock magnetic buckle lets kids secure the chin strap easily, and an easy-to-adjust rear dial conforms to a wide range of head sizes. Product details: - In-molded EPS shell with additional rear coverage for protection and durability - Fidlock magnetic buckle fastens effortlessly for a quick, secure, kid-friendly fit - Dialed fit system provides a secure and comfortable fit - Soft, comfortable, moisture-wicking, and washable helmet pads - Adjustable helmet straps provide a clean look and easy fit management - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership - Helmet meets ASTM standards—their tests use a smaller mass headform more realistic to younger riders - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over Features: Additional coverage An in-molded EPS shell along with additional rear coverage provides assurance for the unexpected. Fidlock magnetic buckle A Fidlock magnetic buckle fastens effortlessly for a quick, secure, kid-friendly fit. Simply move the two ends close to each other and watch as they magically connect. Dialed fit A dialed fit system provides a secure and comfortable fit with a wide range of adjustability. Fresh pads Soft, comfortable, moisture-wicking pads provide instant and maintained comfort and are also removable for cleaning.

Keep it safe with an Electra Commute MIPS Helmet. The perfect balance of form and function, these stylish and sleek helmets are our most advanced yet. - MIPS Brain Protection System - Boa System ensures easy adjustment and secure fit - Camera/light mount and reflective visor - Magnetic Fidlock slide buckle - In mold EPS with PC shell for maximum comfort and protection - Certified to NTA 8776 standard and is ideal for e-bike riders - Size small fits circumference 48 cm - 54 cm and hat sizes 6 1/2 - 6 3/4 - Size medium fits circumference 55 cm - 58 cm and hat sizes 6 7/8 - 7 1/4 - Size large fits circumference 59 cm - 61 cm and 7 3/8 - 7 5/8 - Small size generally fits children while medium and large sizes fit adults

We love what's inside of that head of yours. Keep it safe with an Electra Commute MIPS Helmet. The perfect balance of form and function, these stylish and sleek helmets are our most advanced yet. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientists to help reduce rotational forces on the brain caused by angled impacts to the head. - MIPS Brain Protection System - Fit retention system ensures easy adjustment and secure fit - Magnetic Fidlock slide buckle - In mold EPS with PC shell for maximum comfort and protection - Certified to NTA 8776 standard and is ideal for e-bike riders - Small = 48 – 54cm - Medium = 55 – 58cm - Large = 59 – 61cm