Later 122 models used rubberized webbing for the seat bottom cushion. If you own one of these, you know the webbing stretches in time, leaving you down in a "bucket" seat.
We have replacement nylon webbing with sewn, not riveted ends, to bring support back to your seats. Note: This webbing does not stretch like the OEM materials so seats will feel noticably firmer after installation. Lifetime warranty against breaking. Requires the original clips to install.