Description: Helmet outer shell is high temperature resistant plastic, features high strength, lightweight, strong toughness and corrosion resistance, Inner liner is ultra-light EPU, better shockproof, soft and comfortable, reduce damage to your head. 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 for kids and adults, when doing outdoor sports like: rock climbing, mountaineering, snowboarding, rappelling, caving, ice skating, motorcycling, BMX, scooter, cycling, caving, rappelling, skateboarding, inline skating,? , roller skating, workout, construction, etc. Specifications: Specifications: Material: EPU+PC Head Size: Approx. 56-62cm Package Included: Cycling Helmet*1 Notes: Please check the detail size/model information before purchasing. Due to the different monitor and light effect , the actual color of the item might be slightly different from the color showed on the pictures . Thanks for your understanding. Please allow 1-2 cmmeasuring deviation due to manual measurement. Chat with us should you need any assistance.