Personalized My first St Patrick's Day T-Shirt. This special piece makes a great gift for new parents or as a keepsake to remember your baby's first St. Patrick's Day. Dress your little one in style and create lasting memories! 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.