Ruffwear - Hydro Plane This delicate, floating disc is made for pooches that love to play in or around water and Snow. Delicate on your pooch's mouths and larger than usual size for simple grip, the Hydro Plane™ is excellent for everything from training to a game of tug-o-war. Lightweight and the definite construction allows the Hydro Plane to float on the water and snow for simple visibility in any season