applied to describe the air at the very best of the mountain, which consists of a lot less oxygen, making it more difficult to breatheFor that matter, I think when challenged in court, not all of rare breeds patents will hold up. I feel for a bunch of their patents There's former artwork that can area.＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊�