For very fine and delicate fabrics and pucker free seams, as well as for high quality serging. Especially good as a bobbin thread in combination with Mettler Poly-Sheen or Amann Isacord (40wt). Core-spun construction makes Bobbinette very tear-resistant and very suitable for commercial and embroidery machines. Provides consistent thread tension for optimum interlacing of the upper and bobbin threads. Available in White and Black. 100% polyester. 1000m spools, 5 spools per box.