PRO-TEC Street Lite Army Green X-Large Skateboard Helmet Head Circumferance: 23.6-24.4" or 60-62cm/Hat Size: 7 5/8- 7 7/8. The Street Lite, takes the style of our top selling Certified Classic and shaves off over 30% of the weight using a new low-profile polycarbonate In-Mold shell, fused to an EPS liner. The result is The Classic reborn, lighter and more comfortable than ever!