The Arc'teryx Cormac Heavyweight Long Sleeve is a versatile long-sleeve shirt for a range of high-output activities in cool conditions. It is made with the performance Phasic AR fabric that utilizes wicking fibers and provides light warmth with UPF 50+ sun protection. The long sleeves, crew neckline, and straight hem add to its style and comfort. Featuring FC0 DWR (Durable Water Repellent) treatment that repels water and helps minimize moisture, this long-sleeve tee also comes with thumb loops that secure the cuffs and sleeves, keeping your hands covered for warmth and sun protection. The Silvadur treatment keeps the odor away. Stay comfortable and cool all day wearing this long-sleeve tee. Regular fit with articulated patterning for mobility and comfort. 100% polyester. Machine washable.