>>2219957Canvas is super strong, more breathable than goretex, and waterproof.
A cheap bivy wont survive the rocks and sharp things a canvas bedroll could.
They also usually have much ticker soft foam mattresses and you just roll everything up.
They aren't for backpack or anything, but car camping and in my case motorcycle camping.
They're what the cowboys used.
Pic rel is some other anon's. obviously they come in various sizes.