Not really made in the US but also somewhat tough to get in the US, but I buy most of my stuff from Haglöfs, a Swedish outdoor gear company because you get just about everything from 100% recycled material ... and what isn't recycled is often grown organically.

clothing: http://www.haglofs.com/en-US/products/clothing/layers/

sustainability: http://www.haglofs.com/en-US/sustain.../introduction/