Size:1 Number of items:1 Features:Adjustable,Easy To Clean,Lightweight Department:Unisex Features: 1. Many vents keep you cool, and the easy-to-remove-and-wash interior liner soaks up sweat during harder, hotter bike rides. 2. Bike helmets are hard on the outside (thanks to their PC shell) and soft on the inside, the perfect combination for comfortable, safe bike helmets. Specification: Size: L/free size, head circumference between 54-63cm, head width 18cm, head length 22cm (there is an adjuster knob to adjust the size of the head circumference) Material: EPS material + PC shell Net weight: about 210g Gross weight: about 450g Package size: about 29*22*16cm Product List: 1* Bike Helmets for Men Notes: Due to different lighting and screen settings, the product color may be slightly different from the picture. Due to the difference in manual measurement, please allow a 1-3cm difference in size. Better Head ProtectionThe one-piece design of Bike Helmets for Men disperses the impact force more effectively and protects the head than the traditional fit hat body structure. Easy to Clean and BreathableWith a removable inner lining, it absorbs sweat and is easy to clean. The Bike Helmets feature many air circulation vents and are breathable. Comfortable to WearThe Bike Helmets for Adults are comfortable to wear. They are very light and weigh only about 210g, with little burden on the head. PC and EPS MaterialAdult Bike Helmets are made of PC and EPS materials, which are wear-resistant, impact-resistant, sturdy, strong, and can be used for a long time. Adjustable KnobBike Helmets for Women have detachable brims, which are convenient for you to switch and use at will. At the same time, there are adjustable knobs on the headpiece, so you can easily adjust the tightness according to the head circumference.