Due to their design, many conventional cleaner heads are unable to suck up fine dust and large debris simultaneously.
In order to suck up large debris, a large gap is required between the cleaner head and the floor. This gap can allow suction to escape, and fine dust is left behind on the floor surface and in crevices.
To remove fine dust from the floor surface and crevices, a cleaner head needs a tight seal with the floor to prevent suction power from leaking. A tight seal means that large debris is pushed along the floor.
Dyson engineers have reinvented the cleaner head in order to allow simultaneous fine dust and large debris pick-up. Instead of a brush bar with brisles, the Dyson V6 Fluffy cordless vacuum has a roller covered entirely in soft woven nylon. This traps large debris, whilst four rows of anti-static carbon fibre filaments remove fine dust.