The Bosch GAS Fleece Filter Bag 5pk is highly useful to have as it works as a replacement bag for dry vacuuming. It works extremley well as it is made of fleece, meaning it will collect and remove dust easily. What's more, it is a great addition to tradespeople and DIY enthusiast's tool accessories collections as it is intended for use with Bosch dust extractors. All you have to do is ensure that the automatic filter cleaning (AFC) is switched off to avoid damaging the fleece filter bag.Replacement to keep your dust extractor is great condition Fleece material to collect and remove dust easily Can be used with Bosch dust extractors