EDELWEISS Vital Foam Kit for Enhanced Comfort and SupportHybrid Helmet Design With A Durable Abs Injection Molded Shell And An Eps Inner Foam To Spread The Impact Force. The Vital Ii Has 10 Large Vents For Increased Air Circulation With A Size Fitting Wheel Adjustment For The Perfect Fit. Headlamp Clips To Secure Your Lighting. The Chin Straps Strength Is More Than 50da N To Ensure The Helmet Remains Secured During An Impact. Closure By Innovative Magnetic Buckle Super Easy To Handle Even With Gloves.