Personalized Best Mammaw Ever Grandchild T-Shirt. I have the best Mammaw ever grandchild outfit T-Shirt - White gift from grandma for grandson or granddaughter with elephants. 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.