Dyson 21489101 Cinetic Big Ball Allergy Vacuum Helps remove allergens. Deep cleans across all floors. Latest barrel technology with powerful suction. Dyson Cinetic science captures the dust that clogs the bags and filters of other vacuum cleaners. The only vacuum with no maintenance and no loss of suction, no dirty filters to wash or replace and no bags to buy. Self-righting technology -gets back up when toppled. Ball™ technology steers easily around obstacles and follows without the awkward moves. Hygienically ejects the dirt. Carbon fibre turbine floor tool helps remove fine dust from hard floors and ground-in dirt from carpets. Mattress tool removes dirt and allergens from mattresses and upholstery.