Personalized Best Gramps Ever Fathers Day Grandpa T-Shirt. Distressed lettering T-Shirt - Pink for the worlds best Gramps makes a great birthday or Fathers Day present. 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.