Organic Cotton Button Down Dress. Looking for that sustainable dress to cause a WOW factor when you walk into the room? Check out this stunning white organic cotton button down dress from Reformation. This chic long white dress is made 98% certified organic cotton. It’s sleek design include round neck collar which is complimented by its military style buttons to front and sleeves. Twin with black boots and you will certainly look and feel super sustainable with your fashion look this season.