Built on the F5 chassis and adding to its engineered capability to provide all-day comfort, the F5 Koroyd adds safety and ventilation technologies to provide protection, reduced weight and enhanced ventilation and carries the DOT certification for on-road use.Challenging long-held industry methods, the F5 is leading the way in head protection technology and providing the best possible riding experience.Koroyd? is a next generation energy absorbing technology, engineered with a unique structure and innovative energy management properties. When impacted the Koroyd cores crush homogeneously, decelerating the energy from the impact.MIPS? brain protection system is a low-friction layer designed to reduce rotational motion from angled impacts the head.FEATURES:FULL KLIM? KARBON FIBER SHELLONE OF THE SAFEST HELMETS IN THE INDUSTRYHYBRID IMPACT PROTECTION COMBINES MULTIPLE ENERGY ABSORPTION TECHNOLOGIESKOROYD? TECHNOLOGYMIPS? TECHNOLOGYDUAL DENSITY EPSEXTRA LARGE EYE PORT FOR MAXIMUM FIELD OF VISIONWIND TUNNEL TESTEDFID-LOCK? STRAP CLOSURES (EXTREMELY EASY TO TAKE HELMET ON AND OFF) VENTILATION:MOST VENTILATED HELMET IN THE INDUSTRY18 INTAKES AND 8 EXHAUST VENTSDIRECT VENT EPS DESIGNDESIGNED TO INTAKE AIR AT SPEED / EXHAUST HEAT WHILE AT LOW SPEEDS OR STOPPED SAFETY:SHELL STRUCTURE DESIGNED FOR MAXIMUM STRENGTH WHILE REMAINING LIGHTWEIGHTNECK BRACE COMPATIBLEEXCEEDS ECE CERTIFICATIONS COMFORT:FOCUS ON FITANTI-MICROBIAL AND ANTI BACTERIAL MATERIALSMOISTURE-WICKING DRYLEX? COMFORT LINER3 SHELL SIZES AND 3 EPS SIZES FOR THE BEST FIT AND MAXIMUM COMFORT TO FIT YOUR HEAD LIKE A GLOVE INCLUDED:HELMET BAGBREATH BOXWINDSTOPPER? LINEREXTRA PEAK VISOR/HARDWARE