We're huge fans of Patagonia here, namely their focus on building the best products, causing no unnecessary harm and using business to inspire and implement solutions to the environmental crisis.
And after spending 30 days camping through 10 national parks this past summer, we're even more supportive in their fight to save our public lands (especially close to our heart is Grand Staircase-Escalante National Monument where we spent 4 days in unfettered exploration).
And if you're interested in helping, Patagonia's site does a great job of educating on how to have your voice be heard.