Mulberry Silk Sliver(pronounced sly-ver)! Also known as 'Bombyx Silk' or 'Cultivated Silk' . . . This is the highest quality available. Beautiful preparation! Soft, smooth, lustrous. . . has the ability to just suck up color in a dye bath. Also beautiful when blended with other fibers such as wool, baby camel, cashmere, yak. This is the fiber that others try to be like when they say it's 'silk-like'.