Personalized Four Bikes Men's Premium T-Shirt. Four colorful bicycles with the letters BIKE is a unique gift design for cyclists at birthdays and holidays. Custom Printed T-Shirt. Super Soft 4.5 oz., pre-shrunk 100% combed ringspun cotton, 30 singles. Shoulder-to-shoulder taping. Double-needle stitched sleeves and bottom hem. Adult: S, M, L, XL, 2XL, 3XL. Heather Grey is a cotton/ploy blend.