Organic Cotton White Ribbed Top. Want to warm while being sustainable with your fashion look this winter? Check out this beautiful white ribbed top from sustainable fashion brand Thinking MU. This stunning top is made from 100% organic cotton. It’s features include a high collar neck line with long sleeves. It’s completed with a rib design to make it add that little bit extra special. Another great sustainable fashion design for cold winter months. The best thing is, it’s available in a wide choice of other shades.