Issho kenmei monogoto o suru koto Make a desperate effort
Chemical Fiber Sageo
The Japanese, in their efficient manner, tend to generalize any manmade material as “chemical fiber” this then covers nylon, polyester, Dacron, rayon, etc, etc.. This then also accommodates blends of materials based on percentages. Natural fibers such as cotton, wool, silk, hemp, etc. are of course identified as such.