Casa Calvin Best Double Imperial Doupion Mulberry Silk Duvet - Summer made of premium 100% Pure Mulberry Silk, which is longer, more elastic and rarer than ordinary silk fibers; 
Mulberry silk is a pure natural animal protein fiber, which has excellent skin-friendliness, and contains 18 kinds of amino acids, which can regulate skin moisture and moisturize and resist allergies, helping to resist allergies and softening the skin, and effectively prevent the growth of mites and molds. In addition, the hollow structure of mulberry silk can evaporate sweat and absorb excess heat from the human body, and at the same time, it isolates cold air like double glazing, making it warm in winter and cool in summer, and you can feel a soft and comfortable "soft" sleep.
- Casa Calvin is rare and precious: The probability of the appearance of the Mulbarry silk cocoon is only 3-5%, in addition to its rarity, the Mulberry silk is longer than ordinary silk fibers, more elastic, and less easy to deform.
- Casa Calvin Anti-Allergy Softening: Mulberry silk is a pure natural animal protein fiber containing 18 kinds of amino acids, which can help regulate the moisture of the skin's surface layer to keep the skin smooth and shiny, gentle and skin-friendly.
- Casa Calvin: The hollow structure of silk absorbs excess heat energy and isolates cold air like "double glass"
- Casa Calvin Anti-mite and antibacterial: The hollow fibers of Mulberry silk enhance air flow, making it difficult for mites and molds to
Fabric cover :  100% Mulberry Silk
Filling: not blendet 100% pureMulberry Silk 
*In order to maintain the best fluffy softness and warmth of the silk quilt, it should be avoided from washing and exposure to the sun, which will affect the fiber structure of the quilt.