Isacord 1000m 聚酯纖維 3574 深藍色 縫紉線

This dark blue shade is exactly what my latest project needed, and the thread runs through my machine without any fraying. The tensile strength is noticeably better than standard polyester.

The color is a perfect, rich dark blue that reads almost black until the light hits it, and the polyester is so smooth it glides through the machine without a single snag. Definitely getting the strength boost I needed for this dense design.

I bought this for a complex digitized design and the polyester strength really shows—no breaks or fraying even at high machine speeds. The 1000m spool lasts through multiple projects, which is a nice bonus.