It’s made from nylon 66 continuous filament yarn, 2 or 3 plies bonded together with a special glue, it’s very strong with good sewing performance, applicable for shoes ,leather products ,sports goods ,heavy fabrics etc. Main specifications : 210D/2 ,210D/3 ,210D/4 ,280D/3 ,420D/3 ,630D/3 ,840D/3 etc.