From Treenway Silks, Zen Shin is a beautiful 2-ply silk thread perfect for hand embroidery projects including sashiko stitching on silk fabrics.  This 2-ply thread, not designed to separate the strands, is wonderfully easy to use.

Each card has 10 yards of beautiful hand-dyed silk hread.  The silk is from the Bombyx mori silk worm, often referred to as "mulberry" silk. There’s nothing else like silk! Silk is strong yet delicate, luxurious and lustrous.