Personalized Groovy In October We Wear Pink Breast Cancer T-Shirt. Wear this apparel with pride and join the movement to spread awareness and support those affected by breast cancer. 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.