Personalized Cycling Bike Riding Cyclist T-Shirt. Biking T-Shirt - Athletic Heather with trio of cyclists racing in a bicycle race. Everyone loves our Custom T-Shirts! 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.