RAF seat type parachute cushion

Sandy coloured cotton canvas cushion with brass ventilation eyelets.  Central slot for the parachute harness straps to pass through.  Dense Sorbo rubber padding/insert.  Webbing straps with press studs allow the cushion to be attached to the pack of a seat type parachute harness assembly.  Relatively light/even soiling.  One of the ventilation eyelets is missing and there is some distortion to two others.  Marked 'Flying Club' to one side.   As with most parachute kit these are now increasingly difficult to source.  Stock code S23424.