What Is Welt Cord Piping?
“Welt cord” is a common term for a cord covered edge or trim sewn into a project. It is widely used in furniture upholstery and automotive upholstery, especially when upholstering car seats.
The cord itself can be made from different materials. In some applications, a thin cord is covered with fabric or another material, while in others the cord is used without additional covering. In automotive upholstery, foam cord is commonly used, usually in diameters of approximately 2–4 mm. The color can be selected according to the desired design.