Lightweight integrally-molded bicycle helmet. Made of EPS, high density, durable and comfortable. 18 vents bring cool air in and flush warm air out, well-ventilated. With removable, protective, sweat absorption lining pad, comfortable to wear and easy to wash. Adjustable strap as well as adjuster within to adjust the size of head circumference. Stay safe while cycling with the bike helmet. Its compact style combined with the Advanced In-Mold polycarbonate shell Shock absorbing inner for added protection It has 18 vents to reduce air resistance, keep you cool , comfortable, breathable Fully Adjustable Straps and High Quality Buckle Perfect for riding downtown, up a technical climb, and everything in between Fits most adults (57~62cm Head Circumference) Model number:H-w002 Material:EPS+PC Size:57-62cm Head Wind tunnel: 18 Weight: about 200g Color:Red, blue, black, orange, red wine, dark blue, light green, yellow, pinkoptional Specifications: Lightweight integrally-molded bicycle helmet Durable and comfortable 18 vents bring cool air in and flush warm air out Comfortable to wear and easy to wash Adjustable strap Fits most adults (57~62cm Head Circumference) Package Included: 1 x Helmet Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leaving a message before you give the bad feedback, if the products have some problems. Thanks for your understandings. By the way, if you like our store, P