FOR: Training in cold weather climates FEEL: Polertec® insulation fabric is sleek on the outside and soft and cozy on the inside FAVE: Secure zip pockets to stash your essentials S/427880-02 Fabric + Care 89% Polyester/11% Spandex WICKING: Pulls sweat away from the body to the surface of the fabric so it can evaporate EASY CARE: Just throw in the wash and dry without a second thought Machine wash and line dry.