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Amann's Seraflex is the perfect sewing thread for all stretch, jersey and knit fabrics! With this special elastic sewing thread, you can even sew straight stitches and retain 60-80% elasticity. You can also use a double back stitch instead of overlock stitches to sew stretch fabrics! Made from 100% PTT (polytrimethylene terephthalate), it is particularly suitable for outdoor and sportswear as well as lingerie or everyday wear. Suitable for household sewing machines. Recommended needle size: NM 70-80. Each spool of thread contains 130 meters of thread and is available in a wide range of colours.