●Wearing a cycling hat can effectively prevent sweat and rain. Headaches caused by cold air. ●Elastic back adjustment: 56-61cm Weighs less than 1 ounce, more comfortable to wear. ●Our cycling hats are available in a variety of styles and are easy to fold and carry. ●The flexible brim is designed to fit easily into a riding helmet. It will also get a nice picture when you take off your helmet. ●You can get a full refund immediately if you are not satisfied within one year. Corsehild is confident enough that you can put on cycling hats