Merv 13 Filter Material for Air Filters (32 Ft²) , Stops Air Particles, Allergens, Dust, Mold and Pet Dander as Small as 0.3 Microns, Efficiency Breathable DIY Design (16 Square Feet)

Works well to reduce airborne particulates by filtration. I have noticed a decrease in respiratory issues after use.

I used this to revive an old Rigid air filter system. OEM filters are no longer available so this is a practical alternative.

they worked great

I installed these at my inlet intake to see if I could prevent cat and dog hair depositing in our drain pan or bypassing our regular pleated filter to deposit on our Heat Pumps coils. To make this work, I had to cut to size then tape the back end on the metal intake vent. Then I screwed the vent back in place and vaccuumed the outside periodically. After 6 months I was blow away. Picture one is the back of this filter cloth. Picture two as I am removing to replace is a picture of the front. (The original color of the filter cloth is bright white) The last picture is of our drip tray, which remained pristine. Our normal filter was a bit dirty too, but I got 6 months out of it and the coils to the heat pump are perfect. The filter cloth never moved when the unit was on, stayed in place perfectly. Highly recommended.

Great value for my needs