Personalized Mardi Gras Birthday Celebration T-Shirt. celebrate a birthday with family or friends at Mardi Gras with this crown and party streamer logo 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.