This base layer is made from a quick-drying material called POLARTEC (POWER DRY). The double-layered fabric absorbs sweat and diffuses it to keep the body dry. The moisture-absorbing, quick-drying POLARTEC (POWER DRY), performs well in moments of high activity, maintaining the body\\\'s comfort when sweating. 90% or more of the ultraviolet light is blocked by the material, protecting the skin from sunlight. 30% or more of the water from sweating is removed from the skin compared to a single layer construction. POLARTEC® Power Dry® (Polyester 100%)