Features: 1 Made of high-quality polyester material, which is breathable, quick-drying. 2 The helmet liner is made possible by advanced moisture wicking technology that absorbs and rapidly evaporates sweat tested under extreme sports. 3 It can be used as a liner under helmets providing a comfortable cushions while preventing sweat from stinging the eyes. 5 It is lightweight, durable and has added ventilation for maximum comfort. 6 Great to use for any helmet sport or even as everyday wear. Specifications: Material: Polyester + spandex Color: Solid Color(13 Colors) Camo Color(18 Colors） Size: 26*15cm Function:Elastic,Breathable,Quick-drying Package: 1 x Quick-drying hat Kindly Tip: 1. Conversion: 1 inch= 2.54cm Size Approximately : These size is about Asian Size,general get one size smaller than US\\/EU size,Please reference to the size chart in the picture. Item Measure by hand, it could be 1-3cm different. hope you can understanding, will be sincerely appreciated. 2 .Please be reminded that due lighting effects, monitor's brightness\\/ contrast settings etc, there could be some slight differences in the color tone of the website's photo and the actual item.