Coats Extra Strong Nylon Upholstery Thread 150yd - Black. This thread is great for machine and hand sewing on upholstery, outdoor and heavy fabrics. Use this thread for upholstery, slipcovers, repairing upholstered furniture, repairs to leather or vinyl items such as luggage or purses. Use anywhere exceptional strength is needed. Weather and UV resistant. 100% Nylon. 15 weight, 3 ply. 150yd (137.16m).