Blanket envelope Knitted stars with coarse calico is an envelope sewn of knitted linen with patterns on one side and coarse calico of cotton on the other side. For the convenience of extracting the filler during washing, the envelope is made on a zipper snake. The envelope also represents a universal product and can be used as a duvet, and with the help of a bow on an elastic band as an envelope for a baby. The elastic has an optimal size for easy fixation of the envelope.