Personalized Cinco De Mayo Flags T-Shirt. Party all day on May 5th with a fun T-Shirt - Navy Blue gift that has red, green and black banner flags and a holiday quote. 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.