If you sweat like we do when you ride, you"re going to need the Headsweats Shorty cap. It"s a skull cap that fits under a cycling helmet with short tails that make it easier to take on and off. The CoolMax fabric helps wick away moisture and let some air over your scalp. CoolMax fabric shell helps wick away moisture and let lots of air in CoolMax terry sweatband keeps the salty stuff from running into your eyes Eventure elastic for a great fit Easily fits under most helmets Machine washable