BLACKHAWK! Men's Knock Knock T-Shirt Cotton Quality tested in the field, made of quality materials Built to withstand the toughest terrain and environments Don't sacrifice price for quality, with Blackhawk you get what you pay for 100% Cotton Machine Wash Cold with Like Colors.Non-Chlorine Bleach When Needed. Tumble Dry Low. Cool Iron Inside Out if Needed. Do Not Iron Face Side. China/Honduras