Personalized Breast Cancer Walk Little Sister T-Shirt. Breast Cancer Walk For Little Sister T-Shirt - Red with pink ribbon and lettering. If you have a younger sister fighting breast cancer, this is a great way to show support. 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.