3-D knitted Performance Base High Crew is the perfect base layer for skiing, snowboarding, and ski-touring. It is made of an innovative high-performance fiber called Dryarn®. This fabric is composed of polypropylene microfibers and is anti-pilling, breathable, very light weight, and quick drying. On top of this we added a Dupont Silvadur® treatment of the yarn to provide advanced, sustainable antimicrobial technology that delivers effective odour control. Thermo regulation zones in 3-D knitting help to keep a steady body temperature.