Sustainable Brown Cashmere Top. Looking to fit in with seasonal surroundings in a sustainable way this winter? Check out this stunning brown cashmere top from Thinking Mu. This brown tight fit top comes in a long sleeve design with round neckline. Made from TENCEL which is sustainable and certified wool fibres, it’s a great piece of sustainable fashion to make you look and feel great this season. Fuse with cream trousers for maximum effect. Also available in shades of black and blue.