Gutermann Natural Cotton Thread 9959 C Ne 50 800m Gutermann 100% cotton threads are strong with a naturally lustrous appearance. Strong yet soft, producing smooth even seams. For lock and step seams, overlock and safety seams, underwear buttonholes and sewing on buttons, ornamental stitches and decorative seams. Soft and supple, tear and abrasion resistant. Extendible, light resistant and colour-fast. Recommended needle and needle size: Universal Needle NM 70-90.