THREAD SPOOL: Features one 500 yard spool of Superior Threads Magnifico 40-weight 2-ply thread made from 100% high-strength trilobal (high-sheen) polyester 100% TRILOBAL POLYESTER: Magnifico is a twisted, extra-strength, high-sheen thread which has the bright appearance of rayon, but all the advantages of polyester fiber HEAT SET PROCESSING: Unlike other high-strength trilobal polyester threads, Magnifico is heat set in processing, which eliminates unwanted shrinkage PERFECT FOR QUILTING AND EMBROIDERY: Magnifico threads are excellent for quilting, decorative stitching, and embroidery. MACHINE USE: Magnifico is able to withstand the high speed and tension of longarm and commercial machines