Superior Threads Razzle Dazzle Pack contains 4 spools, 88yds per spool.A thick, 8 weight polyester thread interwound with strands of metallic. Razzle Dazzle is perfect for bobbinwork, decorative serging, couching, and reverse quilting. This thread is iron and dryer safe on medium heat. Usage tips: Razzle Dazzle is too thick for the eye of traditional topstitch needles. Wind it slowly on your bobbin and machine quilt from the back.