Personalized Monogram Letter A Rainbow T-Shirt. Alphabet Letter A monogram T-Shirt - White with cute rainbow and hearts girl design on a pretty gift for her. 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.