Whether you need a sustainable formal dress for a wedding, cocktail party, gala, holiday get-together, or any other special occasion, this guide has you covered. These brands have eco-friendly formal wear that's as sustainable as it is stylish with dresses that can be worn as prom gowns, cocktail dresses, bridesmaid dresses, evening frocks, and beyond. #Sustainableformalwear #Sustainableformaldress #specialoccasiondresses