Specifications: The reflective light woven in the webbing improves safety while being more beautiful. The webbing design is good and comfortable to stick to the face, and the buckle is fixed to prevent the helmet from falling off. Detachable and comfortable inner lining is easy to clean and keep the head breathable. Streamlined design, the convection port reduces wind resistance, breaks the wind and make rides more smoothly and relaxedly. Breathable design with large holes keeps the head cool. It is comfortable enough to wear, freely adjustable according to the size of the head. Item Name: Bike Helmet Gender: Unisex Material: PC, EPS Size: One Size Features: Durable, Shockproof, Lightweight, Breathable, Comfortable Head Circumference Size: 56cm - 63cm/22.05" - 24.8" (Approx.) Width: 18cm/7.09", Length: 22cm/8.66" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bike Helmet