PROTEC Original City Lite Bike Helmet, Matte Grey, Medium Certified helmet with timeless style and modern technology designed for biking, in-line skating, and skateboarding Multi-function, 4-mode LED integrated into the shell of the helmet; dual-direction twist-fit system for dialing in that perfect fit on the fly Stiff EPS foam liner; lightweight polycarbonate shell fused together using a revolutionary in-mold construction Easily adjustable nylon webbed straps;durable stainless steel rivets 11 large vent openings to help keep your head cool during intense use; comfortable interior padding