Cushion bladder with middle layer having gaps and various positioned interior welds

A cushioning device comprising:

• a first surface having a first perimeter edge and a second surface having a second perimeter edge wherein the first perimeter edge and the second perimeter edge are sealed together to form a first side, a head end, a second side and a foot end;
• a middle material
• (a) is positioned between the first surface and the second surface,
• (b) is connected to the head end,
• (c) is connected to the foot end,
• (c) is not connected to the first side and has a first gap area between the middle material and the first side,
• (d) is not connected to the second side and has a second gap area between the middle material and second side, and
• (e) has a top surface and a bottom surface;
• the first surface and the middle material's top surface are joined together at a first set of locations to form a first set of interior welds;
• the second surface and the middle material bottom surface are joined together at a second set of locations to form a second set of interior welds;
• the first set of interior welds on the middle material's top surface and the second set of interior welds on the middle material's bottom surface are not superimposed on each other or overlap each other.