Iso-Chill fabric helps to dissipate body heat and creates the impression of cold. 4-Way Stretch production allows for greater mobility in any direction. The material is a great sweat wicker and it dies very quickly. Anti-Odor technology prevents the formation of microbes that cause an unpleasant odor. Low-profile micro collar. Moulded hem. Under Armour logo on chest and neck. Material: Nylon / Elastan.