Description: With integrally-molded, aerodynamic and adjustable head circumference design, the bicycle helmet is comfortable to wear. With high quality inner pad and unique 28 vents design, the bicycle helmet is fashionable, stylish and breathable, which can improve air flowing and keep your head cool. The ventilated design can effectively reduce wind resistance, which ensures the cycling safety. Made of high quality EPS and PC materials, the product is sturdy, lightweight and durable to use. The length of this helmet is 23cm, the width is 18cm and the height is 17cm. It is suitable for road bike, downhill bike, folding bike, racing bike, mountain bike, etc. Item Name: Cycling Helmet Material:PC,EPS Color: Fluorescent Green/Fluorescent Yellow/Flourescent Blue/Fluorescent + Red Head Circumference: 54-62cm Number of Holes: 28 Vents Size:23cmx18cmx17cm/9.06inx7.09inx6.69in 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 Cycling Helmet