Air Purifier Mask with Fans and Disposable Filters – Koolmask HEXA is a new wearable super mask for removing pollutants like PM 2.5 & PM 10.0, exhaust & other harmful substances. Internal fans keep you cool & refreshed. HEXA is powered to supply up to 150 liters of clean air per minute. It is the solution for commuters, motorists & people with difficulty breathing.