The Nylon66 Bonded Thread has good endurance,good tenacity,mezzo flexility, good sewing ... 103% to 106%,it will come back 100%.Nylon 66 bonded thread adopt nylon 66 filament ,through special process to bond ... .Application:Belt Accescories, Walts,Key,Chains,Fiters,Athletic Shoes,Car Equipment,Footwear,Automotive Trime,Gloves,Book Binding,aTraps,Covers,Handbags,Leather ...