Personalized 1st birthday Blue Giraffe T-Shirt. Whether you're looking for a special outfit for your baby girl or boy, our 1st birthday collection has something for everyone. Celebrate this important milestone in style and create memories that will last a lifetime. Shop now and make your baby's 1st birthday unforgettable! 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.