Thumb Score: +15 Amazon has Invisible Thread 273 Yards-Clear for $1.24 with free Prime shipping. No minimum. https://www.amazon.com/dp/B0053A4...PDKIKX0DER Select no-rush shipping at checkout to receive a no-rush shipping credit.[LIST][*]100% Monofilament Nylon[*]Gutermann Fusible Thread is a time saving product, perfect for fuse basting, quilt bindings, appliques, zippers and more[*]It can be used in the bobbin or on the top thread of your sewing machine and also in the lower looped of your serger