Personalized Nap King Baby Boy T-Shirt. For the baby who loves to sleep this fun Nap King design with crown will make a hit. 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.