Orthrus Adult Helmet Orthrus Youth Helmet Orthrus Youth Helmet Orthrus Youth Helmet Orthrus Youth Helmet Helmet Type Dual Sport / Dirt Dual Sport / Dirt Dual Sport / Dirt Dual Sport / DirtDual Sport / Dirt Dual Sport / Dirt Size Map S ~ XL S ~ XL S ~ XL S ~ XL S ~ XL Material ABS ABS ABS ABS ABS Colors 4 Colors 4 Colors 4 Colors 4 Colors 4 Colors Buckle Quick Release Quick Release Quick Release Quick Release Quick Release Removeable & Washable Liner ✓ ✓ ✓ ✓ ✓ Dual Viosr ✓ ✓ ✓ ✓ ✓ Vehicle Type Compatibility Dirt / ATV / Touring / ADV / Street / Sport, etc Dirt / ATV / Touring / ADV / Street / Sport, etc Dirt / ATV / Touring / ADV / Street / Sport, etc Dirt / ATV / Touring / ADV / Street / Sport, etc Dirt / ATV / Touring / ADV / Street / Sport, etc Suitability Adult Youth Youth Youth Youth Aerodynamic Flow Design The air vents on the helmet release oppressive heat while riding in warm climate, allowing riders feel comfortable when riding off road. Quick Release Buckle Strong and sturdy quick release buckle enable the helmet fit tightly with riders’ head thus improve rides’ safety and makes it more convenient to put the helmet on/off. DOT Safety Standards Providing better protection when riding off road, bike, ATV and participating outdoor sports.