Personalized Tool Box Best Father T-Shirt. Father's Day T-Shirt - Green for dads and step dads with a box of tools says BEST FATHER IN THE WORLD. Perfect for handy dads. 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.