American & Efird on X: "Geotextiles and other rugged outdoor industrial applications require a tough, UV and mildew resistant sewing thread. Anefil Polypro™ industrial thread delivers these features with added chemical resistance.
Amazon.com: All Purpose Extra Strong Heavy Duty Bonded Black Sewing Thread Great for Quilting,Upholstery, Leather, Denim, Marine, Outdoor and Camping Products. T70#69 210D/3PLY 1400 Yards. : Arts, Crafts & Sewing
1500 Yards Tough Polyester Sewing Thread Professional Sewing Machine Threads For Sewing Needle Size 11 14 Not Easily Broken - AliExpress