Pentapulls are made of 4 layers of 1680 denier nylon for super durability. The arms and legs are designed in a patented "X" design and super stitched to form an excellent toy for pulling, shaking and general rough housing. There are no attachment points at the shoulder or hip joints, so no arms and legs to rip off! 5 squeakers add to the fun to make this toy your dogs' new favorite! This is a great toy for multiple dogs or those who love to TUG!