Description: Helmet outer shell is high temperature resistant PC plastic, features high strength, lightweight, strong toughness and corrosion resistance, Inner liner is -light EPS foam, better shockproof, soft and comfortable, reduce damage to your head, with CE Certification Along with a soft hook & loop impact absorption liner, can minimize the harm to your head Adjustable chin strap with quick release buckle, better adjust and fit your head circumference, easy to wear or take down, and with protector design, can better protect your head Vents design provides great ventilation and excellent radiating to your head, heat dissipation, breathable Suitable head size: 52-62cm, good tool for , BMX, scooter, cycling, caving, rappelling, skateboarding, inline skating, roller skating, rock climbing, mountaineering, snowboarding, rappelling, caving, ice skating, motorcycling, workout, construction, etc. Specification: Material: PC, EPS Package Includes: 1 Piece Safety Helmet Note: Please allow slight size deviation and color difference.