The progression toward achieving a low-profile design without compromising any protection finally meets supremacy in a hard shell helmet. The K2 Thrive is clean and simple with the inconspicuous but well performing Passive Channel Venting. Try it on and you’ll find it’s also souped-up with the K2Dialed Fit System and a washable Full-Wrap Liner System for optimal fit and comfort. Construction A hard-shell construction made of a solid ABS shell and EPS foam inside offer protection even with a hard crash. Ventilation The Passive-Channel Ventilation gives you a perfect air circulation Fit System The K2Dialed™ Fit System adjusts the fit easily and precise Certification Bike Certified / ASTM F2040, CPSC (16 CFR 1203) / EN1077: 2007 (Class B), EN1078:2012 + A1:2012 Features:Passive-Channel VentilationK2Dialed™ Fit SystemWashable Full-Wrap Liner SystemRemovable Goggle ClipSummer Pad KitWeight: 500g