HO Sports Molecule 3S Towable Tube 132x128 ROOM FOR 3 ADULTS OR 4 KIDS - 510 LBS. CAPACITY BUILT IN LADDER FOR EASY RE-BOARDING HO QUICK CONNECT TOW ATTACHMENT SYSTEM Abrasion Resistant - reduced "tube rash" often caused by traditional nylon covers. Temperature Controlled - doesn't become hot to the touch due to sun exposure like traditional nylon covers 2 WAY BOSTON VALVE FOR QUICK AND EASY INFLATION/DEFLATION