PROTEC Original Full Cut Helmet, Glow in the Dark Green, X-Large Non-certified skate helmet with full ear coverage; designed for skateboarding, bicycling, and a range of action sports Flexible, form-fitting high-density polyethylene shell; two-stage hard to soft foam transition Dri-Lex moisture wicking liner with comfortable interior padding, and 17 large vent openings that help keep your head cool during intense use Easily adjustable nylon webbed straps;durable stainless steel rivets