The classic double sided print harder faster shirt is back, now in Red and Black. harder on the front – faster on the back design. It’s made of 100% ring-spun cotton and is soft and comfy. The double stitching on the neckline and sleeves add more durability to what is sure to be a favorite! • 100% ring-spun cotton • Sport Grey is 90% ring-spun cotton, 10% polyester • Dark Heather is 65% polyester, 35% cotton • 4.5 oz/yd² (153 g/m²) • Shoulder-to-shoulder taping • Quarter-turned to avoid crease down the center