Burton Men's Expedition Wool Henley Top 90% Poly 7% Wool 3% Spandex Imported Chafe-Free Soft lock Seams for Comfort and Thumbhole Cuffs Ultra fast-drying and highly breathable wool blend: 90 percent polyester, 7 percent Merino wool, 3 percent Lycra Superior wicking action and next-to-skin comfort Expedition weight fabric panel on back yoke for added warmth Extra long body: strap in without your shirt un-tucking Ultra fast-drying and highly breathable drirelease wool blend: 90 percent polyester, 7 percent Merino wool, 3 percent Lycra Superior wicking action and next-to-skin comfort Expedition weight fabric panel on back yoke for added warmth Extra long body: strap in without your shirt un-tucking