We use only the finest threads for longarm machine quilting. Superior Threads®    King Tut® cotton, Masterpiece® cotton, So Fine® polyester, and Bottom Line® polyester Signature®    40 weight cotton, 30 weight polyester YLI®    Jeans Stitch cotton, 40 weight cotton Aurifil®    40 weight cotton All threads are available in a variety of solid and variegated colors. $1 per bobbin for solid colors $2 per bobbin for variegated colors