Designed with comfort in mind! The edge to edge comfort top covered surfaced provides a soft, comfortable riding area while side wings help riders stay on in the turns. Performance is important as well; the embossed finish on the PVC bottom moves through the water with less drag. These tubes will hold up through the most extreme conditions because of their Heavy Duty 30 gauge PVC construction, the one piece, high frequency welded quick connect, and the 4 sewn, foam filled nylon handles. 66" inflated diameter.