Features: brand new and high quality The helmet is made of EPS foam material, which is shock-proof, and protects the safety of the for head. Multiple holes are designed to increase the penetration of airflow, reduce wind resistance, and ride smoothly. The helmet lining is detachable, easy to clean and maintain, it is durable. A warning light installation hole is reserved at the back of the helmet, which can be purchased by yourself to increase the warning light coefficient. Five colors, choose by yourself, to meet your own requirement. Specifications: Material：PC for Shell Molding, EPS Foam for Head Circumference：Adjustable Magnetic Suction Goggles Size：27cm/10.63in Color:Black Yellow for Grey Red White Package Includes: 1 x Bicycle Helmet. note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!