Looking for sustainably designed anti-fast fashion brands

Hey all! Most clothing and fashion brands that you can find in your local shops or online are fast-fashion: cheap to produce in mass quantities, using cheap materials and don’t last very long. For example, I currently buy my t-shirts from Banana Republic Factory for around $10-$15 and they last maybe 8-12 months before they shrink in the wash or discolor.

I’m looking for some alternatives! I’m okay paying a little bit more for stuff that’s going to last a long time. Open to any suggestions for a more sustainable, long-lasting wardrobe!