Kids these days have more trails, bike parks and fun places to shred, so they need a bike helmet to keep up with them. The Bell Sidetrack uses their \'all-mountain\' shape with lower coverage on the rear of the head in a ready-for-action style, complete with a cool visor. The Ergo Fit system makes it quick and easy to get them going.ErgoDial Fit System\'In-Mold\' Polycarbonate ShellPinchGuard BuckleSnap-In VisorWEIGHT: 276g15 ventsCE EN1078 CPSC Bicycle certificationSize: 50cm - 57cm