Tool · interactive
Fiber / thread matcher
Pick fiber and job. The recommendation updates.
All-purpose polyester (default)
Plant-fiber garments are often labeled machine wash (FTC care line). Polyester all-purpose has give and wash life. Cotton 50 wt is a piecing choice, not automatically better in a shirt seam.
Cite: FTC Clothes Captioning (Care Labeling Rule)
All-purpose vs quilting · All-purpose thread kit · Full tool
Guides: thread, fabric, fiber ID. Shop: machines, shears, thread.