The Dunmore's blend of Polyester, Tencel, Cotton, and Spandex offers the performance qualities we all love but with an incredibly soft hand. Throw it on over any sport shirt or polo for lightweight warmth or pair it under a jacket or vest during the cooler months. Specs 47% Polyester /24% Tencel/ 24% Cotton/5% Spandex Heather French Terry Quick Dry Easy Care Stretch Tonal Back Neck Logo Embroidery Metal Zipper Pull Year-Round Weight