100% Polyester Tumble dry low Mountain Dew unisex adult 100% polyester black back tank top. In addition to being 4.5 oz all our shirts are pre-shrunk with a double needle collar, sleeve, and hem made for both men and women. Each shirt is printed on the front and features a black back and trim. All our shirts are hand-printed in the USA using a dye sublimation process that creates slight imperfections over seams and/or folds that are unique to and a part of each item. Each of our designs are officially licensed and 100% authentic. The designs are created by our incredibly talented in house graphic art team who often hand draw and illustrate each Tee shirt design. 100% Satisfaction for the first 30 days, guaranteed! If you are unsatisfied with our product, we will replace it or refund you immediately. Our shirts are machine washable. Tumble dry low. Not to mention, our graphic tees are the perfect holiday gift, birthday present, or just treat yourself!