"O.S.® Racing" T-Shirt is made of 100% cotton. Pre-shrunk. Black T-shirt with print/graphics on both front & back: Front: "O.S.® Racing" (blue and gray print) with red & yellow flames behind "O.S." on left breast. Back: "O.S.® Racing" (blue and gray print) with red & yellow flames behind "O.S."; www.osengines.com. Made in Honduras.