The Outdoor Research Helium Wind Cap is an ultralight, durable, and breathable wind cap complete with mesh panels and a cooling sweatband. The crushable design allows it to fit in small pockets.Thermo-regulating and cooling ActiveIce(TM) sweatband2.75" brim widthPackable design with a flexible brimReflective logoRefective back adjustment shock cordFabric is water resistant and wind resistantBreathable and lightweight