Sevylor 54-in. River Tube Heavy-duty PVC construction is rugged for lake use Multiple air chambers allow the other chambers to stay inflated if one is punctured Airtight System is guaranteed not to leak PVC mesh bottom helps you stay cool in the water while floating Back rest lets you lean back and enjoy the ride Snap N Stay System connects Sevylor products together 2 cup holders keep your drink close at hand Grabline makes it easy to climb in and out Handles make it easy to hold on and to carry Double Lock valve uses two locking points for easy inflation/deflation Fits one person Diameter: 54 in. 30 day limited warranty