[【 SWEAT CONTROL & SUN PROTECTION 】Our wicking helmet liner are sweat-absorbent keeping sweat and hair out of your eyes and face.Your will feel cool when you use this skull cap under the helmet and help you to keep the helmet cleaner.This UPF 50 skull cap will also protect your head from harmful UV ray. "【 SOFT MATERIAL 】 The Skull Hat is made up of polyester breathable and sweat-absorbent features Light weight fabric wick away sweat.Its easy to hand/machine wash in cold water and dries quickly." 【 SUITABLE MOST PEOPLES HEAD 】One size hat fits 20" - 25" head circumference.The sweat wicking cap has high elasticityfit for most people head shape .Both women and men can have a smooth using experience brought by the helmet liner. 【 MULTIFUNCTIONAL HEADWEAR 】The cooling cycling cap can be applied for various occasions such as running jogging mountain-climbing cycling training swimming etc also suitable for daily wearing and work. Can work as skull cap helmet liner sleep hat cycling cap running cap welding skull caps providing a cool wearing experience for you. 【 SUITABLE FOR ANY SEASONS 】 This sweat skull cap will keep you warm on the cold weather and keep you cold on the hot weather or keep your hairless head from being cold while sleeping. We provide professional customer service if you not satisfaction with our running cooling caps please contact us we will provide you with a satisfactory solution. Enjoy shopping!]