The Dyson Big Ball is the Dyson bagless vacuum. This vacuum can turn 360 degrees thanks to the big ball they're on. If your vacuum falls over, it'll return itself to an upright position. The Big Ball smoothly rolls along behind you and follows you to every corner of the house. Thresholds and corners aren't an obstacle to this Dyson vacuum. Choose the Dyson Absolute if you've got various kinds of floors in your house, or go for the Dyson Cinetic if you never want to lose any suction power.