Muji's gray and navy mittens, made of wool and polyester for warmth. - Brand: Muji - Color: Gray/Navy - Material: Polyester/Wool - Size: Free Size Thank you for viewing. Muji's two-tone baby mittens The color is a dark navy and a color that looks like gray or perhaps dark brown. I purchased these last year, but they were never used and my child outgrew them, so I am selling them. They are new and unused, but please understand that they have been stored at home.