Tuffy toys like this Ocean Creature Shark are the most durable dog toys on the market! With up to 4 layers of material, the toys are bonded and sewn together for added durability. Most dog toys have just one seam to hold the toy together. Tuffy toys can have up to 7 rows of stitching! A protective webbing is sewn around the outside edge to cover the seams of the toy and make the toy even stronger. These toys are built to last, but keep in mind that no toy is indestructible. Tuffy toys are designed to be used for interactive play and are not chew toys.