Climadowna Duvet 400 Grams. It is a cool product with a heating level of 2 out of 5, thanks to its 90% Goose Down Filling and Outlast Holy Fabric with Climate Balancing Technology. However, it can be used in heated houses in summer and winter because, thanks to its technology, it provides a comfortable sleep in any environment without sweating or feeling cold. The cotton fabric is 100% cotton with Nomite feature and is feather-proof. Nomite Certificate Guarantees That It is Suitable for People with Dust Mite and House Dust Allergies.