Made from luxurious Mulberry silk that is ultra soft and smooth, have the most peaceful night's sleep KOO Elite Mulberry Silk Pillowcase. Silk is the most hypoallergenic of all the natural fibres, making this pillowcase highly delicate on the skin. Silk also features natural temperature-regulating properties, making it cool and soothing to the touch. Great for sensitive sleepers and all skin types, this silk pillowcase will add a premium feel to your bedroom.