Black Corovin Upholstery Lining Fabric Base Cloth Dipryl Spun Bond Liner 70gms (Please Select Length From The Drop Down Menu). Black – Upholstery Base Cloth / Under Bottom Fabric also known as Dipryl / Corovin / Spun Bond. A quality 70gms 39 wide fabric it is ideal for a multitude of upholstery projects for use on the base of sofas, chairs etc. Ideal for a multitude of upholstery projects for use on the base of sofas, chairs, cushions, dog beds and much more. 70gms, 39″(100cm) ” wide. It has an extremely even web pattern and has equal strength in both directions. Strong, durable and lightweight. Visit NRC Lifestyle Shop For More Products.