The fabric we use is the finest pure heavy silk (30-40 momme) in very high quality, "silk crepe back satin". It don´t see through and don´t wrinkle so much. We use both sides of the silk fabric, depending on the impression we want to get across, deep glossy sheen or matte deep luster. Silk is a natural and durable material, breathable, warm in winter and cool in summer. Very nice to have on the skin. Washing instructions: Dry clean recommended but can also be washed carefully in lukewarm water with a mild detergent or baby shampoo.