A complex, multi-thread stitch that sews two raw edges of fabric together so they butt up against each other rather than folding into a traditional seam allowance. This creates a highly stretchable, low-profile seam that lies perfectly flat against the skin. It is the industry standard for athletic wear, base layers, and wetsuits where a raised seam would cause chafing.
Heard on the job
Set up the machine for a four-thread flatlock on those running tights so the seams don't rub.
Also heard as
- flat seam