1. Unisex, suitable for all seasons, comfortable and breathable 2. Retro shape, multi-layer anti-slip, lightweight helmet body, ventilation and breathable, free adjustment 3. The helmet is made of mesh material, which is soft and comfortable to wear, and the inside is breathable and not stuffy 4. The inside of the helmet is circulated and ventilated, and the inner lining is breathable and cool 5. ABS material, multi-layer structure shell, strong and durable 6. High-density and lightweight material, comfortable to wear for a long time 7. Exquisite buttons, beautiful atmosphere 8. Detachable earphones for easy cleaning 9. Convenient and fast buckle, firm and reliable 10. Mesh lining, comfortable and breathable, mesh ventilation 11. Material: ABS 12. Suitable for head circumference: M: 56-57, L: 58-59, XL: 60-61, XXL: 61-62 13. Dimensions: 24 x 25 x 27cm 14. Net weight: 0.9kg 15. Gross weight: 1.1kg