COATS CLARK Dual Duty XP Heavy Weight Thread. This thread was designed to meet the needs of sewers when it came to denim, double knits, drapery fabric, faux fur, felt, fleece, leather and faux leather, quilted fabrics, sweater knits, ticking, twill, upholstery, canvas, duck, and sail cloth. Recommended needles: Machine: 14(90), 16(100) or 18(110), Hand: sizes 1 to 6. This thread is ideal for bold topstitching, cording, and stitching hand-worked buttonholes. Obtain a smooth beautiful finish, consistent tension, balanced twist, excellent stitch formation, low breakage, color-fast, and weather resistant with this unique polyester wrapped core spun thread produced using a new advanced spinning technology. Spool features the dual-trap system for a more secure storage without the spool unwinding. Each spool is 125 yards/ 114 meters. 4 Color Value Pack - Black Natural Slate White - One 125yd spool each Designed to meet the needs of sewers when it came to denim, double knits, drapery fabric, faux fur, felt, fleece, leather and faux leather, quilted fabrics, sweater knits, ticking, twill, upholstery, canvas, duck, and sail cloth. Spool features the dual-trap system for a more secure storage without the spool unwinding. Recommended needles: Machine: 14(90), 16(100) or 18(110), Hand: sizes 1 to 6. This thread is ideal for bold topstitching, cording, and stitching hand-worked buttonholes. Smooth beautiful finish, consistent tension, balanced twist, excellent stitch formation, low breakage, color-fast, and weather resistant.