Originally Posted by Lilrain
I believe there are some specifically for embroidery and others that are cotton for quilters and sewers. I use the 100% cotton and have for years. Love the convenience and they have so much more on them than winding your own, so I can sew so much farther without having to change bobbins
I'm with you. I love that I can sew for ages without putting in a new bobbin. A friend got me started using them and I also just toss the bobbin when it's done.