The Perfectly Pretty PoLylite Thread sampler pack contains 6 spools of fun, with each spool having 440 yards of thread! Perfect for micro-stippling or fine detail quilting and more accurate piecing. Sulky 60 Wt. PolyLite (polyester) thread creates delicate decorative stitches and crisp readable lettering, with the look and feel of silk, but is stronger and less expensive.