These toys are made with two layers of material for added durability. The first layer consists of 1,000 Denier Cordura (a very strong material) which is stuffed with our recycled pieces of fleece then covered with faux fur. This toy has a 4 strand braided fleece ends with a tennis ball. These toys are excellent for building toy and tug drive, they are intended as an interactive toy so be sure to put away after a training session to prolong the life of your toy.