Have a blast skimming the surface at water-scorching speeds. It has the center hole of a traditional inner tube, but its bottom is fully covered so you won’t fall through. The smooth bottom also offers faster top-end speeds. Heavy-duty, seam-welded PVC bladder is covered with double-stitched, 840-denier nylon for puncture- and abrasion- resistant durability. Nylon-covered handles with neoprene knuckle guards reduce chafing and provide a sure grip. Kwik-Connect compatible. One-person capacity. Diameter: 54".