Our 22 Momme line of seamless silk duvet covers are made from 100% Grade 6A mulberry silk.The 22 Momme weight class is a step-up from the entry-level 19 Momme product line both in terms of luxury and quality. Made with better silk fibers and weaved in Charmeuse style with a great satin finish for extra-polished surface shine this duvet cover will undoubtedly brighten up you bedroom and with a thread count 1.5 times than that of the 19 Momme duvet covers its estimated shelf life almost doubles that of the 19 Momme.The seamless duvet cover is directly cut from a whole piece of silk fabric and thus does not have any seams in its material making using washing machines to clean this duvet cover a walk in the park.