Personalized 11th Year Anniversary 11 Years Anniversary T-Shirt. 11th Year Anniversary 11 Years Anniversary apparel and gifts has two sloths hanging. Click on the tabs to choose the product, size, and color that you wish this design to be printed on. 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.