We exclusively use Next Level brand premium athletic fit, ultra-soft 4.3 ounce 60% Ringspun Cotton / 40% Poly performance blend t-shirts. Pre-shrunk. Double-needle stitching throughout and taped shoulder to shoulder for durability. 100% designed and printed in the U.S.A. by Downrange Apparel, no cheap iron-on graphics! Athletic fit, shirts will fit slightly more snug through the shoulders and chest. All shirts are preshrunk but t-shirt will shrink slightly with the first wash. To avoid any shrinkage, simply wash the shirt in cold water and air dry it the first couple times you wash it.