The Wool Set recommends the use of Kächer dry Vacuum Cleaners for their quality 100% wool carpets. With their four-stage filter system, Kächer Vacuum Cleaners achieve a retention rate of up to 99.997% meaning you'll have better indoor air quality. Kächer Vacuum Cleaners offer you reduced noise levels, larger washable fabric bags and several models to suit any application, commercial or domestic. Ask your Wool Set retailer for more details.