Polyester thread for your embroideries. These come in packs of 2 cones = 10,000m of thread. Currently in black and white combo only.
Polyester thread is shiny, strong and colourfast. Can be used for regular sewing, quilting and serging as well as machine embroidery.
White is notoriously difficult to photograph but rest assured that this white is brilliant white - not light grey/blue!