Kreinik Silk Serica® is a 3-ply, 100% pure FILAMENT SILK with a magnificent, rich sheen. It is a versatile silk thread that can be used singly as a fine twisted silk or it can be separated for use as a highly reflective flat silk for more advanced stitching techniques (like Japanese embroidery, canvas work, laid work). Available on 10 meter (11 yard) spools.