Personalized 2nd Birthday Owl T-Shirt. Whether you're planning a 2nd birthday party or simply looking for a unique gift, our 2nd Birthday Owl design apparel and gifts are the perfect choice. Make their 2nd birthday unforgettable with our charming owl designs. 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.