Booda 2 Knot Rope Bones can be used for interactive play or as solo dog chews. These natural cotton bones are a fun and easy way to floss your dog s gums and help prevent dental disease. Feature machine washable, tightly twisted cotton for long-lasting durability. Available in two-knot or three-knot designs and in a variety of sizes. Made from natural cotton. Dimensions: 1 x 3.5 x 8.