Join Date: Jun 2009
Location: Alston, Cumbria
These things are heavy enough even without filling the spaces! I'd suggest some kind of strap arrangement instead of filling the conical space with anything (which will also cause a lot of sweating). It'll be a little more fiddly to do, but in the long run it'll be much lighter and more comfortable when you wear it.
90% of people think they are above average.
Statistically Improbable. Psychologically Inevitable.