Flatlock Seam (detail)
Also known as: Flat lock stitch, 6-thread flatlock, coverstitch flatlock
Flat joining seam in which two fabric edges are butted together and locked with typically 6 threads on both sides — creates no bulk and does not chafe.
Description
The flatlock seam (flat lock stitch) is the characteristic joining seam of active and functional wear. Unlike classic overlock or felled seams, the fabric edges here are not layered on top of each other but butted edge to edge. A flatlock machine, usually with 6 threads, locks both sides of the seam together, creating a completely flat, symmetrical join.
The advantage is friction-free wear: the seam creates no bulk on either side and cannot chafe under sports load. Flatlock is therefore the standard on compression sportswear, swimwear, cycling shorts with a chamois pad, baby bodies and functional underwear. A "mock flatlock" on a coverlock machine with only 3 threads imitates the look but does not reach the same strength.
- 6 threads for true flatlock, 3 threads for mock flatlock
- Edge-to-edge join without ridge
- Standard on compression sportswear, swimwear and cycling apparel
- Reduces chafing on next-to-skin garments
Properties
| Thread count | 6 (true), 3 (mock) |
|---|---|
| Seam type | Butted edge-to-edge, completely flat |
| Advantage | No chafing, no bulk |
| Application | Compression sport, swimwear, cycling shorts, baby bodies |
Related product categories
Sources & references
2- Wikipedia: Flatlock Wikipedia — Freie Enzyklopädie https://en.wikipedia.org/wiki/Flatlock
- Wikipedia: Overlock Wikipedia — Freie Enzyklopädie https://en.wikipedia.org/wiki/Overlock
