100% Cotton Heavyweight Fabric - Heather Colors Have Some Polyester High Quality 4 Inch Twill Letters with Satin Stitching Around The Two Layers Lifetime Guarantee on the Twill Letters - They Will Never Come Off Officially Licensed Product Fashion Greek - Rep a higher standard with our double layer tackle twill letters. Highest quality satin stitching around the two layers. The letters are industrial heat applied to a heavyweight cotton or cotton blend shirt (heather colors have polyester) and come with a lifetime guarantee...they will never come off! Sizes: Small, Medium, Large, XL, 2XL, 3XL, 4XL and 5XL. Perfect gift for the fraternity brother or sorority sister in your life!