If you are looking for the most sustainable sweaters and amazing, organic cardigans, look no further than our favorite ethical clothing brands: KOTN, Pact, Mate The Label, Neu Nomads, LA Relaxed, Vetta Capsule, The Knotty Ones, Universal Standards, Eileen Fisher, and Tentree. All these companies use premium and natural materials like wool, organic cotton, modal and cashmere to craft knits with the lowest environmental impact possible.