on the weight of pet fiber the sheet has a weight of 500 g m 2 and thickness of 1 76 mm the sheet was subjected to a high speed water jet treatment by passing it once each for both surfaces through a high speed water jet apparatus in which orifices of 0 25 mm diameter were arranged in a straight line at interval of 2 5 mm in the widthwise direction of the process line further in comparative example 6 the same treatment as example 9 was conducted but the high speed water stream treatment was omitted the sheet obtained in example 9 followed by drying was found to shrink slightly in the lengthwise direction but was of excellent flexibility in contrast the sheet obtained in comparative example 6 was found to be hard and had a conspicuous rubber like elasticity next the sheets were sliced into halves and both surfaces of the sliced sheets were subjected to buffing by a buffing machine provided with a sandpaper of 150 mesh the resulting sheet was dyed using disperse dye at 120 u00b0 c for 50 min and finished through reduction clearing and addition of anti static agent as a result the sheet obtained in the example was a leather like sheet having a high flexibility good drapability and good hand closely resembling natural suede in contrast the sheet obtained.