Abstract: A inflatable raft having multiple inflation members formed into a polygonal shape wherein the panel segments include inner and outer flaps which form an overlap or closing seam wherein the outer flap includes an extended outer flap segment to form a modular member for interconnection with respect to a raft floor or cover apparatus. The extended outer flap segment also facilitates heat sealing for securement of a cover, canopy or floor with respect to an inflatable polygonal construction. The configuration of the polygonal inflatable raft with the extended outer flap segment can be used singly to form a flotation raft or can be used doubly to form an invertible inflation raft apparatus or a canopy covered inflatable raft apparatus.