Your essential sewing machine thread guide - Gathered
Amazon.com: Sewing Thread 30 Colors Sewing Industrial Machine and Hand Stitching 250 Yards Each Sewing Thread Polyester
25 CTS California Thread & Supply Polyester Machine Embroidery Thread USA Sewing | eBay
Sewing Thread Part II: The Best Quality Sewing Thread - Suzy Quilts
Amazon.com: EZ-Xtend #138 Bonded Polyester Thread 100% American Made for Outdoor and Marine Fabric Sewing Applications, Awnings, Tarps, Canvas. for Heavy Duty and Industrial Sewing Machines (White, 8 oz)
Sewing thread types and uses
A&E Sustainable Thread Solutions | American & Efird
Polyester sewing thread for shoes & accessories: Serafil