Description: Made of hard and lightweight ABS case shell with premium soft velvet liner for superior protection and comfort Adjustable chin pad and easy click fasten / release buckle 11 Air vents for easy drainage and breathable With ear protectors and waterproof interior lining Suitable for rock climbing, , roller skating, skateboarding, bicycles and other outdoor activities Specification: The helmet has got CE and CPSC certification Material: ABS Dimension (L x W): Approx. 10.24 x 8.66 inch/26 x 22 cm Suitable Head Circumference: Approx. 21.26-24.4 inch/54-62 cm Adjustable to fit most people, including kids and adult Package Includes: 1 Piece Safety Helmet Note: Please allow slightly difference due to manual measurement. Color maybe slightly different since different monitor. Thanks!