Personalized Shut Up and Ride T-Shirt. Shut up and ride! A cyclist races along so fast that flames trail behind the bike. Great gift for biathletes, cyclists, or people who just love to ride a bike for fun! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.