It is made of 100% 1.2D x 38mm polyester staple fiber of high-tenacity, low-elongation by special spinning, dyeing and finishing, the rate of exhausting lubricant is 2-6 %. It is featured by perfect glossy luster, excellent lubricity, few knots, good rotting proof, low water shrinkage, high fastness to abrasion, washing, sunlight, perspriration and sublimation. This product is especially applicable for high-speed sewing.