I believe I bought these but didn't use them for outdoor wear. I think I used them a few times as driving shoes since I didn't wear shoes in the car, but I just washed the soles and put them away. There are white spots around the edges, but it's not dirt or discoloration; I think they were there from the beginning. They're incredibly warm if you wear them for camping or indoors in the dead of winter! These are fleece-lined so you can wear them comfortably even barefoot. The heels can be stepped on, so they can also be worn as sandals. The outsole uses 40% recycled rubber, which is durable and environmentally friendly.