The Chuckit! Rugged Bumper is designed to withstand tough dogs and rough play. The rigid polypropylene core provides durability and strength, while the contoured shape and over-molded TPR ridges allow dogs to easily grip for pickup and retrieval. The attached nylon straps on each end flap when the toy is shaken stimulate your dog's instinct to hunt and shake prey. The Rugged Bumper also floats, making it great for both land and water play! The bright color provides high-visibility for dogs. One size suitable for medium and large dogs.