Originally Posted by watertones
I found what I was looking for, just took a bit of searching magic. I'm looking for deep cold applications and it seems as though canvass would be the best from what I have found so far. Sounds like a thin cotton though, like bed sheet cotton and not heavy canvass, right?
You are correct.
Bed sheets lack the dimensions you need, and are likely a little thin. They are also usually a cotton poly blend.
4 oz canvas like they sell at fabric stores will do fine.
Technical Note on Canvas for Extreme Cold