Personalized National Bike Month Biking Cyclist T-Shirt. Biking design has person riding a bicycle with quote that says May is National Bike Month on this T-Shirt - Black with distressed style logo. 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.