Superior King Tut Quilting Thread is a 40wt 3ply 100% extra long staple Egyptian cotton. It is perfectly suited for hand quilting, machine quilting AND especially wonderful for longarm machine quilting. Superior King Tut Thread is one of nature's finest threads. It is certified Egyptian-grown, extra long staple cotton. This means the staple fibers are 10% longer than regular long staple cotton. That translates to LESS lint and MORE strength. Available in 136 variegated and solid colors.