OLLIN1 Mens Lightweight Waffle Knit Long Sleeve Crewneck Thermal Shirt 60% Cotton / 40% Polyester Durable, soft thermal knit fabric helps retain body heat Smooth flatlock seaming won't rub or irritate Ribbed trim on cuffs and neckline / Shirttail hem Machine wash cold water / Gentle cycle / Tumble dry low / Do not belach Please look at the measurements below for guidance