Captures up to 99.999% of fine dust. Multi-stage filtration system. Enjoy filtered air with a multi-stage filtration system that captures up to 99.999% of dust particles. The cordless vacuum cleaner features a metal net filter that collects coarse dust, while the jet cyclone with a microfilter captures fine dust, and the ultra-fine dust filter can take in micro-dust. All parts and filters are washable, allowing for hygienic cleanliness.