Highly efficient filter fibre
The 360° Glass HEPA filter is constructed from 1.1 square metres of constructed borosilicate microfibres, pleated 254 times. Removes 99.95% of particles of any size, right down to PM0.1.
To the left are two filters, magnified 100 times. One is the from the best-selling purifier in Japan, and the other is from the Dyson Pure Cool™ purifier fan.