Cushioning body of a seat for vehicles

A cushion body for a seat for vehicles which comprises:

• a main pad portion made of a foam material and having an upper surface;
• front and back portions made of a foam material and each having a superimposing surface, said front and back portions being each integrally connected with corresponding forward and back edges of said main pad portion and bendable therefrom, whereby said respective front and back portions can be folded at said corresponding forward and back edges with said superimposing surfaces thereof being superimposed on said upper surface of said main pad portion, said superimposed front and back defining a front pad portion and back pad portion on said main pad portion;
• left and right side portions made of a foam material and each having a superimposing surface, said left and right side portions being each integrally connected with corresponding left and right side edges of said main pad portion, and bendable therefrom, whereby said respective left and right portions can be folded at said corresponding left and right side edges with said superimposing surface thereof being superimposed on said upper surface of said main pad portion, said superimposed left and right portions defining a left side pad portion and right side pad portion on said main pad portion;
• and
• a recessed portion formed in one of all before said superimposing surfaces and said upper surface of said main pad portion, or in both of all before said superimposing surfaces and said upper surface of said main pad portion, said recessed portion being adapted to store an air bag therein.