Now you can have the best of both worlds with the look of traditional sewn-on letters at a value price. Our Alpha Tau Omega Sim Stitch letters are real two-layer twill that has been etched with a laser to simulate a zig-zag stitch. Eliminating the stitches allows for a lighter decoration, adding extra comfort to this medium weight 50/50 cotton/poly fleece hooded sweatshirt.