Mulberry tree silk duvet in which only the hand spread fibers are used. This provides a better moisture absorption as the wild silk which often is used. The 100% silk ticking warms you when its cold and cools when its warm. Washable at 40 degrees and available in two thermal classes. Thermal class 4 which has 175 grams per m2 which is ideal for the summer and heat class 2 with 300 grams filling m2. The duvets can be connected which each other by a button system.