Gutermann Top Stitch thread is a heavy, 100% polyester thread with a high-lustre; ideal for decorative sewing and ornamental stitches for button-hole sewing, seams and fashionable accents. Suitable for heavy-weight fabrics. Manufactured using Micro Core Technology', this guarantees a strong, tear-resistant, line-free thread. For best results when machine sewing, use with Sew-all Thread as bobbin thread Needle / Needle size: Universal Needle NM 100 - 120 Thickness: No. 30 Machine washable at 40'C