What is a ergonomic backpack?

Ergonomics as applied to backpack is mostly just a buzz Word used by a high percentage of "Backpack johnny come latelys' as a sales tool.

The application of ergonomics to backpacks increases as the contained weight in the backpack increases. There are some major ergonomic factors articles that break a little light on the subject but fall far short of the overall picture.

Example: I have never seen an internet article that mentions the back sweat factor or the fact that if the ergonomics is good a cross chest strap isn't needed.

Ralph 'Andy' Drollinger

Design Engineer-Founder of Adventure 16