Arm warmers used to be saggy. Worse, they'd get soggy just from sweat, let alone rain. ArmSkins™ officially put an end to saggy, soggy arm warmers. ArmSkins to stand up to roughest roads, trails and the inclement weather. They stay right where you put them, keeping you drier and more comfortable the whole way. ArmSkins are also excellent for running and hiking. This version is made with CoolMax® EcoMade™, the fiber made from recycled resources.