The covers installed on antistress duvets and pillows do not prevent the effect of carbon fibers. Product Features: Poly&Cotton is a fabric and contains 59.6% cotton, 40% polyester and 0.4% carbon. The fabric weave density is 70 threads. It is filled with 750 grams of special polyester fiber. Product Size: 50x70 cm Product is sent as a Roll Pack. After the package is opened, it is fluffed and ready for use. Washing Instructions: It can be washed at 40 degrees. It cannot be bleached. It cannot be dried. It cannot be ironed. It cannot be dry cleaned.