Personalized Environmental Rocks Text Long Sleeve T-Shirt. Environmental engineering rocks in colorful musical text is a unique gift design for engineers and students at birthdays, holidays and graduation. 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