Product Details     Style: S1808005 Safety is important, but so is having a good time, so the K2 Phase Pro Helmet is designed to give you both. Safety comes from the fully-certified Hard Shell construction, and fun is no challenge for the built-in Baseline Audio system. There are even comfort features built in, like the K2 Dialed Fit System that gives you a secure custom fit, and a removable and washable Full-Wrap Liner. FEATURES Weighs just 17.3 ounces (490g) Removable and washable Full Wrap Liner provides comfort you can count on all season long Active Matrix ventilation lets you control airflow through your helmet for comfort Ergonomic K2 Dialed Fit System allows for simple adjustment with just the twist of a dial Hard Shell construction provides durable protection that won’t dent or scratch Compatible with Outdoor Tech® aftermarket Bluetooth audio systems (sold separately) Meets or exceeds ASTM F2040 and EN 1077:2007 (Class B) safety standards K2 Phase Pro Helmet (Men's)