Tremor Inflatable Tube AIRHEAD TREMOR’s unique wrap-around horseshoe shape is shaking up the tubing world! The multi-level design allows you to kneel on the soft knee pads and ride looking out or sit on top looking in. TREMOR accommodates up to 4 riders and makes a great floating conversation pit too when not being towed behind a jet ski. Put a cooler in the center and have a party! TREMOR has a tough 30-gauge PVC bladder, fully covered with an 840-denier double-stitched nylon cover. It is equipped with a heavy-duty Kwik-Connect tow point for easy and secure hook-ups as well as two patented speed safety valves for fast inflation and deflation. Eight foam filled tubular nylon handles with neoprene knuckle guards are strategically positioned for peak performance.