Personalized Knock Out Ovarian Cancer 4ever T-Shirt. Knock Out Ovarian Cancer 4ever T-Shirt - Neon Green with a teal pair of boxing gloves and ribbon are a great way to show people to stand up and fight cancer. 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.