The squeaky chewing bone “Kristoff” has a nub design, which helps to massage the gums and to dental care. You can also throw the bone and is therefore ideal for playing and fetching with your dog. The chewing bone is made from 100% natural rubber, which is non-toxic, environmentally friendly and BPA free. Always provide plenty of fresh water. Please only let your dog play under supervision. * Natural, durable material The indestructible dog toys consist of 100% natural rubber. They are very durable, easy to clean, soft and elastic, resistant to bite.