Glide 60wt thread is a finer Glide Thread without as much sheen as 40 wt thread. It is still a filament polyester thread, lint-free, giving great definition to small designs and tiny fills when quilting. It is also the same thread that is on the Magna Glide Classics pre-wound bobbins. These M class bobbins hold 203m of thread. I put my partially used ones in my sewing kits as they are excellent for applique, hand piecing and EPP. The small size and the magnetic core come in handy.