The KONG PEK11 Duratreat Bone Large Dog Toy is made of durable, KONG-crafted K120 material that is perfect for your dog’s natural chewing instincts. The flexible design provides a mentally stimulating challenge, while the textured grooves offer a satisfyingly sharp edge. The stuff pockets are large and can accommodate up to 15 pounds of kibble or treats. The bone shape wobble feature increases the puzzle challenge, and the durable construction ensures lasting fun.