100% Silk Top Quality 100% Pure Long Grade Mulberry Silk Filling. 100% Cotton Sateen Casing. King Size (86x102 inches) (220x260cm). Free vacuum bag and cotton storage bag. Light Weight, Perfect for Spring / Autumn or Indoor Temperature 59F to 77F, 15C to 25C Breathable, Lightweight and Long lasting Easy to care Moon's silk filled duvets/quilts give you ultimate sleeping experience. It adjusts to your body temperature and shape, warm in winter yet cool in summer and drapes perfectly around you. Cleaning/Maintenance: 1) Silk filled duvets may never need to be cleaned if you use removable duvet cover. Clean it carefully with a little bit water if you really have to. NOT MACHINE WASHED. 2) Regular basking in the sunshine will keep your duvet revitalised and refreshed. 3) Store it in breathable bag or duvet cover in a cool and dry place.