Personalized My 1st Earth Day T-Shirt. Hugging our planet, this cute little boy is ready for his 1st Earth Day on T-Shirt - White to share the message that we should love our planet and environment and keep it clean. 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.