Gutermann's Upholstery Thread, made from 100% polyester, is well-known to be an incredibly strong, durable, and rot-proof brand of thread, tough enough to handle leather, vinyl, denim, canvas, carpets, and more! This upholstery thread is prized for its soft and flexible qualities that are sure to make way for immaculate, flat seams. And, it'll hold beautifully when washed! This upholstery thread comes in spools of 300 meters (328 yards) and is available in a nice variety of colors suitable for a wide range of upholstery projects.