Personalized Celiac Disease Awareness Ribbon T-Shirt. Celiac Disease Awareness ribbon T-Shirt - Purple for a support walk or event shares the message about gluten allergy. 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.