Question: what does 40/2 thread mean?
Answer: There are 3 basic index/information when we describe a yarn/thread. ... 100% polyester is the composition,40s=Ne 40,yarn thickness/size is 40s(English system),Tex 29.5 (Metric system),/2 means the yarn/thread in 2 plies,2 pieces of 40s double and twist as one yarn/thread.