Whether you sit or sleep on it, if it has quality springs inside, it is probably CWL you are resting on. Some of the world’s leading, most innovative bedding and furniture producers rely on CWL to provide the consistent quality wire to form their sophisticated springs. Carbon spring wire is used extensively for the manufacture of coiled springs in mattress manufacturing, Zig Zag, Square formed and Helical wire in the Bedding and Seating industry.