The Bell Sidetrack II Mips Kids Helmet has been improved with all-around coverage and MIPS protection. This all-mountain helmet offers a removable visor, an easy adjustable fit system, Bell\'s sweat guide padding, and ready-for-action style that will get your child motivated to hit the trail!Bell Sidetrack II Mips Kids Helmet FeaturesCertifications: CPSC Bicycle, CE EN1078Vents: 14Construction: Fusion In-Mold Polycarbonate ShellFit System: Ergo Fit™ (integrated with MIPS)Snap-In VisorNo-Twist Tri-Glides™Sweat Guide™PinchGuard Buckle™MIPS® - MIPS stands for Multi-directional Impact Protection System. The MIPS Brain Protection System (BPS) is found inside the helmet, generally between the comfort padding and the EPS (a high-quality foam used to reduce energy). For certain impacts, the MIPS BPS can reduce harmful forces transmitted to the brain.Weight: 300gSize: Universal Child 47–54 cm