100% spun polyester sewing thread (20S, 30S, 40S, 50S, 60S, 80S) with various lengths and strands Our factory always uses foreign raw materials 1.2D x 38mm staple fiber, for polyester sewing thread, which is imported from Thailand, Indonesia, and Korea. It is the best raw material for 100% spun polyester sewing threads (20S, 30S, 40S, 50S, 60S, 80S) with various lengths and strands.