Adult Bike Helmet Protective Road Cycling Safety Mountain Bicycle With Light Specifications: Helmet material: integrated PC shell, effective impact resistance, wear resistance and drop resistance. Thickened EPS lining with padded effect. Helmet lighting highlights: Equipped with illuminated headlights + warning taillights, the headlights are in constant mode, the taillights are set to three driving modes, constantly flashing rapidly - flashing explosively, safe driving at night . Optional helmet size: there are adjustable buttons on the back of the head, S size, suitable for head circumference 48-53CM; M size, suitable for head circumference 54-57CM;L size, suitable for head circumference 58-61CM. Applicable scene: cycling, balance bike, skateboard, etc. Package Included: Helmet * 1 Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as the pictures show. 2.Due to manual measurement and different measurement methods, please allow 1-3 cm deviation. Thanks! Payment Delivery details Return About us Payment 1. We only accept Payment, thanks. 2. Payment must be made within 4 days of orders placing. 3. TOTAL AMOUNT DUE includes the final auction price plus S&H(Shipping and Handling).