Can you also use silage safe without a silo?

No, the silo walls are necessary for the use of Silage Safe. This is due to the principle: the woven cloths are placed between the roughage and the silo walls, so that the roughage is closed off 100% airtight. Due to the trainage pipes in the lower seams and the pressure of the roughage against the walls, the cloths get stuck and you can pull the cloths together with a lot of tension.