ChallengerTM3 3 air chambers including an inner auxiliary chamber inside main hull 2 quick-fill, fast-deflate Boston valves Rugged vinyl construction Inflatable I-beam floor for comfort and rigidity Grab handles on bow 2 oar holders on each side Motor mount fittings Two pairs of welded oar locks All around grab line U.S Coast Guard I.D TUV approved Repair patch Shelf box 320 kg capacity (3 persons)