DESC: AIRHEAD's 4 rider space ship inspired towable spins on its axis like a top as you pull it behind your boat! Vary the spin speed by driving the boat faster or slower. You don't want to spin? No problem. Just thread the tow rope through the NO SPINNING harness and UFO provides a more conventional tube ride. You'll have a lot of laughs with all 4 riders facing each other. The reinforced tow strap has a heavy duty stainless steel swivel at each end. It is attached to a Kevlar mounted oversized stainless steel tow ring at the center of the bottom of UFO. UFO has an 86 in. diameter, an RF welded 30 gauge PVC bladder and a double-stitched 840-denier nylon cover with 2 Boston valves and 4 mesh self-draining vents. Spin to the cosmos with UFO!