Elastic · 142yds/130m · 100% PTT · Stretches up to 65%
Mettler Seraflex Elastic Thread 7840-4000 Black is the go-to choice for sewing stretch and knit fabrics. Made from innovative PTT fibre, it stretches up to 65% and recovers fully — keeping seams comfortable and flexible through every movement.
Key Features
- Stretches up to 65% — ideal for stretch fabrics, knits, and activewear
- 142yds/130m per spool
- 100% PTT (Polytrimethyleneterephthalate) — elastic recovery with smooth stitch formation
- Use as needle and bobbin thread with loose tension for maximum elasticity
- Recommended for straight stitches only
- Compatible with domestic sewing machines
Recommended Uses
- Stretch and knit fabrics — women’s, men’s, and children’s clothing
- Sportswear, activewear, and outdoor apparel
- Underwear and lingerie
- Any application requiring seam elasticity
Needle Recommendations
- 70/10 or 80/12 Stretch or Jersey Needle recommended
- Use the loosest possible thread tension for best results
