This clothing is some or the best you can get but it's a bit pricey though. My friend has the hooded sweatshirt and it is awesome. This stuff is made of wool or OMNITHERM and OMNILIGHT some dirt and stains won't matter. It's guaranteed with something like even if the damage is your fault they will replace it. Even though it's expensive I think it's worth it.
http://www.ruth-ann.bravepages.com/king/king.htm
And these clothes don't look expensive even thought they are.

Frank