Personalized Ahoy Matey 1st Birthday T-Shirt. 1st birthday T-Shirt - Gold with a life preserver and a big number 1 says AHOY MATEY! LOOK WHO'S ONE!. Perfect for your little skipper's first birthday. Everyone loves our Custom T-Shirts! 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.