We found old sandbags (at least 6 years passed).
We found so old Super UV Bag and UV Black Bag at our site.
Both of them were damaged by rain, ultraviolet and temperature fluctuation.
Even though, there were no holes on the surface of them.
We dropped them at 30cm height, but they weren’t broken.
Still now, they can be used as a sandbag for water control.
※The above result doesn’t mean guaranteed value.