I hadn't seen a post on this, so I figured I'd throw it out there for fellow Gear Geeks. I don't know anything more about the product than listed (and no, I have no vested interest in it).
Argon is a widely available and safe gas which creates warmth by extracting the heavy molecules out of the air and is alleged to create warmth greater than even the finest-quality down. Argon is impervious to wet conditions and even has some buoyancy.
Klymit (http://klymit.com/store/) of Utah is spearheading an effort to make clothing and pads with Argon and they are presently taking preorders at a 25% discount. Please note, this discount is only available through July 31st.
Personally, I think this represents a pretty interesting product for lightweight backpacking, but it does have some limitations which includes the potential to leak and the need to inflate the item after each use with a pressurized Argon-filled container similar in size and concept to a CO2.
And no, I don't know anything about the weight of these items…
