These look identical to what we call a mini-bulk bag here; used to deliver ~2000lbs of
feed.
If the material is the same, modern ones are plasticky and not real nice once UV starts breaking it down.
I wouldn't want to use them on my
land, unless they were well shielded from UV in a pretty permanent application...
'Theoretically this level of creeping Orwellian dynamics should ramp up our awareness, but what happens instead is that each alert becomes less and less effective because we're incredibly stupid.' - Jerry Holkins