Blue Organic Cotton Shirt. Looking for that relaxed sustainable fashion look this spring? Check out this Blue Organic Cotton Shirt which is a new arrival at OuterKnown. This casual ladies blue shirt is made from 100% organic cotton. As a utility-inspired shirt it is cut from the softest lightweight organic cotton flannel from Portugal for endless versatility and year-round wearability. Its features include corozo nut buttons, oversized chest pockets and double needle stitching for added strength. Fuse with sustainable jeans for that super sustainable fashion look all year round.