3 air chambers including an inner auxiliary chamber inside main hullQuickfill, fastdeflate Boston valve on main hull chamber (model 1)Two quickfill, fastdeflate Boston valves (models 2 & 3)The INNER AUXILIARY CHAMBER alone will keep you afloatRugged vinyl constructionAllaround grab lineInflatable Ibeam floor for comfort and rigidityInflatable cushions (model 3)Grab handle on bowWeldedon oar locksOar holders (model 2 & 3)Motor mount fittings (model 3)U.S. Coast Guard I.D.TUV approvedRepair patch