Features climasense carbon thermoregulation technology: fast wicking and dryingnMidweight warmth (2.0) makes authentic thermal extremely versatilenUPF Rating 25+nSet-in sleevesnThe dual-ply microfiber fabric Traps air and allows breathabilitynAuthentic thermal is the workhorse of the terraforms women's line. This soft versatile top will protect you while skiing on a cold winters day or keep you comfortable shoveling snow in the driveway. The two-ply midweight microfiber fabric traps plenty of air to keep you warm, dry and comfortable throughout the day. If you are a busy lady you don't want to worry about your layers. Authentic thermal gets it done.