Royal Elite Silk Duvet with all cotton casing. Silk is one of the strongest natural fibers available. The most famous benefit of silk is its naturally antimicrobial, hypoallergenic properties. It prevents the growth of mold and dust mites which makes silk a sound choice. It also is air permeable and can naturally absorb humidity which helps keeps you dry during the night. Available in four sizes. Twin size - 66 x 88''; Double - 80 x 88''; Queen - 90 x 88'; King - 104 x 88'';