The Gütermann Over/Bulky Lock 1000m light grey 38 730808 sewing thread is the essential textured thread for achieving professional edge finishes on stretch fabrics. With 1000 meters of soft, highly flexible, bulky polyester, it's designed to feed into overlock machine loopers without breaking. The light grey 38 shade is extremely versatile, blending perfectly into a wide range of grey and patterned fabrics, ideal for sportswear and t-shirts.