Personalized Brain Cancer For My Dad Awareness Support T-Shirt. Brain cancer support gray awareness ribbon with for my Dad slogan on a T-Shirt - Navy Blue for a son or daughter to wear at a family walk event. Everyone loves our Custom T-Shirts! 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.