The F5 is the ultimate all-day helmet. Designed 100% from the ground up, only the best designs, years of rider feedback, testing data and cutting-edge technologies are integrated into this revolutionary lid. Combining extremely low weight, intuitive venting, and next-gen safety features, KLIM has engineered the F5 to provide the best possible riding experience in the most demanding environments, all day Features Full Klim® Karbon fiber shell One of the lightest helmets in the industry Extra large eye port for maximum field of vision Dual density eps Wind tunnel tested Fid-Lock® strap closures (extremely easy to take helmet on and off) ventilation Most ventilated helmet in the industry 18 intakes and 8 exhaust vents Direct vent eps design Designed to intake air at speed / exhaust heat while at low speeds or stopped safety Shell structure designed for maximum strength while remaining lightweight Neck brace compatible Exceeds ECE certifications comfort Focus on fit Anti-microbial and antibacterial materials Moisture-wicking Drylex® comfort liner 3 shell sizes and 3 eps sizes for the best fit and maximum comfort to fit your head like a glove Helmet bag Breath box Windstopper® liner