Personalized Happy Earth Day Environment Conservation Long Sleeve T-Shirt. Happy Earth Day Long Sleeve T-Shirt - Athletic Heather has cute stitch border planet earth for celebrating our planet's beauty and encouraging conservation and renewal of our resources. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL