It is produced for single duvet covers measuring 160 x 220. the outer fabric is made of special cotton terry cotton fabric. there is high quality 1st quality silicone fiber in the inner filling. it is made of microfiber fabric and is light, fluffy and soft. has air permeability. does not sweat. it can be used for many years. the product is sent as a roll package. it will be ready in a short time after the package is opened. wash only at 30 degrees in the first wash. you can ask your questions from the ask seller option. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.