Naturally Dyed Rainbow Silk Embroidery FlossStitch a naturally dyed rainbow! This thread is perfect for: embroidery visible mending sashiko stitching boro stitching Each box of Naturally Dyed Rainbow Silk Embroidery Floss includes eight 10 yard skeins. Seven skeins are naturally dyed in the rainbow colors shown and one skein is undyed. Floss is: 100% silk Peace silk, meaning no silkworms were harmed in its making naturally dyed washable, permanent colors 20 2 weight, similar to size 5 cotton