The fleece filter bag is a replacement bag for dry vacuuming. The fleece bag easily collects and retains dust. It offers better durability, performance, and safety compared to standard paper bags. Suitable for dry vacuuming dust classes L and M, as well as for simple wet vacuuming. When using a fleece filter bag, make sure that the automatic filter cleaning is turned off to avoid damaging the fleece filter bag. Compatible with: GAS 12-40 MA, GAS 400 A Professional.