? Determination of the seat compression distance ESW o from the compression stress-straincharacteristics while at the same time recording the measured height h 0 under the preliminaryforce F v = 20 N in the 2 nd set cycle.? Static pressure load with F = 320 N plus a preliminary force F v = 20 N in moist heat +40 °Cwith 80% relative humidity for 16 h. The pressure load is realized by means of suitableweights.? After reconditioning for 24 h in the DIN 50014-23/50-2 standard climate, the seat compressiondistance ESW 1 is determined from the compression stress-strain characteristics, while at thesame time recording the measured height h 1 under the preliminary force F v = 20 N in the 2 ndset cycle.