Description: Premium Material: This fashion bicycle helmet is made of PC and EPS material, integrated design, with great impact and shock absorbing protection, and better cushioning.Ventilation Comfortable Wearing: This cycling helmet is streamlined structured, with breathable vents, lightweight, keeping you cool and drying, long time comfortable wearing.Adjustable: The bike helmet for men and women is designed with adjustable chin strap, head circumference adjustable by turning the dial on the back of the helmet.Feature: Lightweight, breathable, and comfortable design, effectively reduces wind resistance and lets you keep comfortable and cool in riding. won't tire you at all and fits for city riding, road, and mountain bike cycling.Wide Applications: This stylish bicycle helmet is widely suitable for outdoor travel, cycling, biking, bicycling, skateboarding, etc. Besides, it is also a great gift choice for outdoor lovers. Specification: Material: EPS and PC Size Chart: 28cmx21cmx15cm/11.02inchx8.27inchx5.91inch,Suitable for Head Circumference 58cm-61cm/22.83inch-24.02inch Package Includes: 1 Bike Helmet Note: Please allow slightly errors due to manual measurement and different monitors.