WHY, would anyone waste money on something like this, given the superb bags now available?

Some of the finest sleeping bags made anywhere and I have or still do own bags from almost all the top makers, are made in Calgary and weigh about 4 lbs or a bit more for an "expedition" grade model.

These, are "Integral Designs" bags and their XPDII "Himalayan" model, a custom version of which I currently own, will work in severe cold and weighs about 4 lbs.

Bags, by Valandre, Feathered Friends, Western Mountaineering and the famed British maker "Peter Hutchison Designs" ( this one I have not had, but, PHD certainly has the "rep" in mountaineering-exploring circles) will do anything that the Woods sacks ever did and much more.

Yes, I have used them, back in the mid-60s and in the cold, but, I soon learned that a "better mousetrap" was available and would never actually spend money on one.