Personalized Green Ribbon Awareness Long Sleeve T-Shirt. Green Ribbon Awareness Long Sleeve T-Shirt - White shows support for organ donation and transplant, leukemia, mental health issues, gastroschisis, bipolar disorder, cerebral palsy and environmental causes. 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