The Merino Base Layer Tee in Sharkskin from Taylor Stitch Designed in collaboration with GORUCK. 4.5-oz. 89% merino wool, 11% nylon. Merino wool carries antimicrobial, quick-drying, and insulating properties. Nylon blend helps the merino wool retain its shape and be more abrasion resistant. Crew neck. Reinforced double-layer shoulder construction. Rib on the neck opening. Machine wash cold, do not bleach, hang dry. Made in China. Model is 6'1" and 180 lbs, wearing a Large.