Glide is a type of thread used for longarms. It's produced here in the US (hagerstown, MD) & is a polyester. It outshines most other brands of thread, plus they have what is called Magna-glide pre-wound bobbins. They have a magnet in the center of the bobbin. It's an awesome thread, tensions are always perfect & stitches out beautifully. It's also a lot cheaper than the other threads. You can go to their website
www.bobbincentral.com for more information. It's also used a lot for embroidery.