Mighty Mats balls are heavy-duty rubber Toys resistant to chewing for dogs. They are perfect for any dog that chews aggressively and can destroy other Toys in minutes, and they come with a 3-year chew guarantee. They have a hollow center, making them ideal for stuffing with treats or pastes. They also float, making them great for playing fetch. Suitable for dogs weighing from 27 to 40 kg.