The Seraflex elastic sewing thread 4-spool set is ideal for sewing with stretchy fabrics. With spools in black, white, grey, and red, each 130 meters long, this set covers a wide range of basic sewing needs. Made from 100% PTT, Seraflex offers up to 65% stretch, making it perfect for sportswear, lingerie, children’s clothing, and more. Used for both needle and bobbin thread with low tension, it delivers twice the seam elasticity of conventional threads. Durable, versatile, and certified by Oeko-Tex, this set is a reliable choice for sewing elastic seams with confidence and comfort.