Jobe Compound 3 Person Ski TubeJobe Compound 3 Person Ski Tube The Jobe Compound 3P is a 3 person convertible ski tube that runs with or without its backrest. Ride with the backrest installed for upright seating, or unzip and deflate the backrest for a flat deck same tube, two riding styles. Twelve handles with neoprene knuckle guards run across the deck so three riders have multiple grip points. A safety chamber adds backup buoyancy, and water drains clear excess water between