EMIL VIENNA only sells 100% Grade A Mulberry Silk. Silk duvet has naturally mite-resistant, antibacterial, and hypo-allergenic properties, being kind to your skin all round. The sericin in natural silk will not only help you to have glowing skin, it is also effective in preventing the spread of both mould and dust mites, making it extremely beneficial for allergy sufferers. Mulberry silk is produced by domesticated silk worms in the south of China. The white thread is long and fine, with a faint glimmer of yellow. It is exquisitely smooth to the touch, and gives off a characteristic faint scent. Covers made from this type of natural silk are wonderfully soft and comfortable next to your skin. Larger covers usually need a small amount of quilting work to join the inner silk padding in place. Attention: Your natural silk cover should never be creased, placed under heavy objects, vacuum-cleaned, stored with moth balls, or exposed to direct sunlight.