POC Trabec, Helmet for Mountain Biking, Hydrogen White, XL-XXL PROTECTION: Features an EPS liner, outer PC shell, and aramid fiber grid for protection and durability FULL COVERAGE: Designed to provide more coverage at temples and back of the head FIT FOR YOU: Size adjustment system VENTED: Aerodynamic ventilation channel system with 16 vent slots FEATURES: Adjustable visor