53” circle(inflated) inner tube features the amount of space palatial to even big guys, especially the generous space on the seat, which lets you really sprawl out on, instead of being curled up in the narrow seat. The material thickness of PAFOLO swimming tube floats is made up to 0.46mm, It means dramatically reduced risk of punctures, leaks and highly extended longevity! The mesh seat is well finished around the edges to prevent ripping, and strong(heavy duty pvc) to resist corrosion from long time immersion(Not fabric mesh ones easy to be corroded/fragile once immersed). Hyper-Flate Valve allows 5x faster inflation and deflation compared to traditional valves. 2 cup holders for drinks, 2 heavy-duty handles for a firm grab, the separate inflatable headrest with flexibility up and down can be well adapted for any of your lying postures. Safety notice: this river tube tube is designed only for calm waters (such as slow-moving rivers and lakes) and is not a professional rafting tube. Avoid using it in rapid currents or rivers with complex terrain. River Tubes for Floating Heavy Duty