Chuckit Ultra Duo Tug is a dog tug toy that has durable cord for enthusiastic play and tennis ball ends for added fetching fun! Developed to have high bounce, high buoyancy, high visibility, and high durability. Raised sides make for easy pick-up. Flexible rubber edges are gentle to your dog's mouth. Designed for the most demanding use, these are no ordinary balls. Durable 2-ply.