This crinkly blanket is made of 100% wool on the side that touches your skin and organic cotton on the gauze side. You can use it by itself, or place it between your down comforter and your body for extra comfort. The wool material makes it less likely to get stuffy and it fits your body perfectly. Even if it gets dirty, it can be easily washed in the washing machine, so you can keep it clean and convenient to use. (We recommend using a laundry net.)