Leatt Helmet MTB Trail 3. 0Protection you can feel, comfort you won't forget The Leatt Trail 3. 0 is a trail-ready half-shell helmet built around a 3-in-1 safety system that addresses low-speed, high-speed, and rotational impacts in one package. At the core is Leatt's 360deg Turbine Technology, which allows the helmet to move slightly on the head during an impact to help reduce rotational forces and absorb concussion-level energy. The in-molded Power Bridge and impact foam handle high-speed protection, while 19 vents and Maxi Flow air channels keep airflow moving even at lower speeds. A removable visor with a breakaway function, Fidlock magnetic buckle, integrated eyewear dock, and moisture-wicking washable liner round out a feature set that's hard to beat at this price point. Features360deg Turbine Technology allows the helmet to move slightly on the head upon impact, reducing peak rotational brain acceleration and absorbing low-speed concussion-level impact energy3-in-1 safety system combines the 360deg Turbines, Power Bridge in-molded force absorber, and impact foam to address low-speed, high-speed, and rotational impacts together19 vents with Maxi Flow air channels for maximized airflow, effective even at lower trail speeds Removable visor with breakaway function for adaptable sun coverage and added safety in a crash by reducing rotational impact forces Fidlock magnetic closure system for fast, secure, one-handed buckling even with gloves on Eyewear docking port with anti-slip function for secure sunglasses storage above the visor Flat Lock strap divider and fit system for a customizable, comfortable fit across a wide range of head shapes Moisture-wicking, breathable, anti-odor, and washable inner liner for all-day freshness3-year Leatt Helmet Replacement Program included SPECIFICATIONSShell Lightweight polymer compound Impact Protection360deg Turbine Technology + Power Bridge in-molded force absorber + impact foam Ventilation19 vents, Maxi Flow air channels Closure Fidlock magnetic buckle Visor Removable with breakaway function Certifications AS/NZS 2063:2008, EN1078, CPSC 1203Weight From 350g Intended Use Trail, All-Mountain, XC MTBSizing Size Small Medium Large Head Circumference (in)20 - 21 5/8"21 5/8 - 23 1/4"23 1/4 - 24 3/4"Head Circumference (cm)51 - 55cm55 - 59cm59 - 63cm | Leatt | Helmet Mtb Trail 3. 0 Men's | Size Medium In Grey