In addition to the cutting date, degree of wilting and compression, airtight coverage with a silage film and an underlay film is a particularly important factor in ensuring excellent silage quality. For optimum protection of the silage, Polydress® vacuum film is available in widths of 6 m (19') up to 20 m (65'). The stable film guarantees low gas permeability, even in the event of high mechanical loads.