Sustainable companies you should know:
circularfashionla.com - A repair/re-dye/re-design company where customers can freshen their looks by altering their current clothes
foreverywear - A repair company that also provides tutorials on how to do your own clothing repairs.
Further, a company called Remake provides an in-depth look at how well clothing companies are performing in the areas of social and environmental justice. Their accountability report is here: Remake