Personalized Not a Mermaid T-Shirt. She had so many adventures under the sea, you see. Now, she had given up her tail in trade for raising a child with a prince who was never home in the castle. Raising a baby alone, at the young age of 16, really didn't have too many perks. 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.