Personalized Celiac Disease For My Sister Awareness bird T-Shirt. Celiac Awareness Ribbon Bird with sister quote on T-Shirt - Purple says I Wear Light Green For My Sister on this support walk product. 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.