PC shell and EPS foam design makes it shockproof and impact resistant. Adjustable head circumference design makes you can adjust as you need. Thicken chin pad design makes it sweat and moisture absorbing for comfortable wear. Multi vent holes design makes it breathable and quick drying. It is made of quality PC and EPS material. Detachable liner design makes it easy to clean. It is suitable for cycling. Item Name: Bicycle Helmet Material: PC, EPS Gender: Unisex Vent Holes: 22Pcs Suitable Age: Adult Features: Integrated, Breathable, Detachable Lining Size Details: One Size: 30cm x 21cm x 15cm/11.82" x 8.27" x 5.91" (Approx.) Fit Head Circumference: 58cm-61cm/22.83"-24.02" (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 Bicycle Helmet