Dogs love to chew and a strong, durable rope can not be beaten. Tuggers dog toys are not only durable and safe, and they also clean teeth and gums. Tuggers knot ropes are the perfect pet accessory for they are made from durable, heavy cotton and come in an array of shapes and sizes. They have an assortment of rawhide chips and cow hooves. You and your hero can have hours of fun together, playing fetch, tug-o-war, they are the perfect toy for the very energetic dog. The knot ropes are machine washable .