- Quality Material: This outdoor mountain bike road helmet is made of PC outer shell and EPS inner shell, providing you with a sports experience. The helmet is designed with ergonomics and multiple protections against falls and impacts. - Versatile Use: Adult Bike Helmet with detachable pad is suitable for extreme road, mountain biking, and outdoor cycling. It meets the needs of various scenes and provides more riding experiences. - Protection: The EPS material is fall resistant and pressure resistant, offering comfortable breathability. The removable inner lining and lightweight design add to the comfort level during use. - Ventilation Wearing: This Full Face Bike Helmet is streamlined and structured, with 31 vents, comfortable and breathable. Removable Lining is convenient cleaning, keeping the head fresh, and long time comfortable wearing. - Wide Applications: This Mountain Bike Helmet for Men Women is widely suitable for outdoor travel, cycling, biking, bicycling, skateboarding, etc. Besides, it is also a great gift choice for outdoor lovers. Specification: - Material: PC outer shell and EPS inner shell Size Chart: M: 55cm-58cm/21.65inch-22.83inch L: 59cm-61cm/23.23inch-24.02inch Package Includes: 1 Bike Helmet 1 Bag Note: Please allow slightly errors 1-2cm differences due to manual measurement.