I have a lot of serger thread from 18yrs ago when I bought my serger and then got out of sewing for years. This year I bought a Viking Ruby and I'm making free standing lace ornaments and tree toppers. The site where I got the pattern says that polysester (serger) thread is better for the lace than the normal rayon thread used in embroidery. It's working really well and the best part I really feel that these cost me know thing to make except time since I've had the thread so long. It's still stong so I used it.