Merv 13 Filter Material, Air Filters for Stops Bacteria, Air Particles, Allergens, Dust, Mold and Pet Dander as Small as 0.3 Microns (16 Ft²)

I will surely buy again & again for my DIY filtration needs. TY

I use this material on my vacuum cleaner, to make it into a heap or close to heap Vac. I wrap the factor filter with one wrap and adhere it using rubber bands. It does not interfere with performance on either of my vacs including shark, and works so well the factory filter doesn't need cleaning after use and eliminates vacuum exhausting allergens. Great stuff. Its so inexpensive, I do not reuse it.

Did the job

Good

When I ordered the 16 square foot piece of filter I did not realize how thin it was. I cut it easily to fit behind the existing filter. Within hours it was easier to breath but within days it was same old thing. There were no care instructions. So it appears I need to wash the filter weekly to get the desired effect.