Silk Velvet – pure silk velvet is very expensive (close to $1,000 a yard) and not widely available. Most silk velvet today is a blend of silk and rayon. Satin – a confusing term at best. Technically "satin" refers to the weave of a fabric and not to the fabric itself. But satin is a term often using to define a smooth shiny fabric made of acetate, polyester and rayon. "Satin silk" is an ultra-luxurious silk. If you are looking for the best quality silk pillows, choose products made with mulberry or cultivated silk and with a momme weight of at least 12. If you are looking for a more affordable option, Habotai and Charmers are popular. Hope these terms will help you choose the silk that is right for you.