HIGH QUALITY AND SAFT MATERIAL: This dog tension ring made of high quality EVA,non-toxic and durable,very sutible for dogs bite. VERY SOFT: You can do a good workout in the open air and give the dogs a full dog training with an outdoor dog toy. GREAT TENSION: You can hold the ring,then let your dog bite it with strong power,great tension can keep pet's health and increase pet's intelligence. REDUCE DOG ANXIETY: Drive away boring times and relieve the anxiety and frustration of dogs or pets,do more exercises and keep dog or pets health and stronger.Also can offer safety for dog bite. PROTECT FURNITURE AND SHOES: With this dog fitness ring,your lovely dog will have much more fun instead of chewing furniture and shoes.