Fitpack ZR-307 is a premium quality lubricated 3 ply nylon industrial sewing thread designed for heavy-duty stitching applications. It delivers strong, smooth and reliable seams for school bags, luggage, upholstery, sofa covers, car seat covers and industrial bag stitching. The lubricated finish reduces friction, improves machine performance and minimizes thread breakage during high-speed stitching. Suitable for use with single needle, double needle and overlock industrial stitching machines.