Eighteen gauge steel holds up a fully upholstered seat and back on this foldable chair. Supported by triple braces and a double hinge on each side. The double riveted braces are stronger than the welded versions on most chairs. A padded seat and back give this chair a comfortable edge over most other folding chairs. Each set of four chairs has a strong metal frame and long lasting vinyl seat, so your chairs will be providing convenient comfort for years to come.