CT54 54" Donut. Glide. Hydroslides new Comfort Top tubes are designed with comfort in mind. The Edge to Edge Comfort Top surface provides a soft, comfy riding area. Performance is important as well; the embossed Hydroglide finish on the PVC bottom moves through the water with limited drag. These tubes will hold up through the most extreme riding conditions because of heavy duty 30 gauge PVC construction, the one piece, high frequency welded quick connects, and injection molded rubber handles. Built for one rider.