Gutermann Sew-All Thread - shade 324. This thread thread combines the excellent sewing properties of silk with the strength and durability in the seam of polyester. 100% polyester. Suitable for all fabrics, for hand and machine sewing.Please note colour accuracy cannot be guaranteed, due to variations in computer display monitors. Where possible, we have listed matching zips, threads and fabrics under "Additional Information" - please contact us if you need further colour matching advice.