Blanket 200x230 cm Pillowcases 50×70 cm Material 100% cotton Filling bio-down Dupont Sorona Bio-down was created by Dupont and 3M Thinsulate. The material consists of biological components that are processed using a special technology. Bio down Dupont Sorona is very soft, elastic, light, has an airy structure. One of the main advantages is high environmental friendliness and hypoallergenicity.