RRiody Dust Breathing Mask Reusable Activated Carbon Dustproof Masks with 6 Extra Carbon Filters for Air Pollution Pollen Allergy Woodworking Mowing Running Cycling Outdoor (1mask+6filter)

Adjustable hook & loop strap Adjustable hook & loop strap for optimal fit, dual one-way airflow vent expels condensation keeping the mask interior dry, the M Plus dust mask shell and valves can be washed when they get dirty, the filter is replaceable. Soft and flexible breathable Mesh dust-mask shell and valves can be washed when they get dirty, the_filters can be replaceable Five Layers of Filter Structure The first layer blocks large particles, the second activated carbon filter layer filter benzene, car exhaust. The third and fourth layer filter 0.03-0.3 microns of dust and particles. The fifth non-woven layer comfortable and breathable. Replaceable filter, easy to change activated carbon filter by opening air valves