2 PACK MSA3/MSA3S HEPA Replacement Filter Compatible with Membrane Solutions MSA3 and MSA3S Device, 3-Stage HEPA FilterThe Forest Stewardship Council

I just realized after buying these that membrane solutions (probably some company that buys wholesale stuff from random Chinese distributors) wants you to use the genuine filter and I hate when companies do that especially no name online companies.So to get this filter to fit into the membrane solutions air purifier and actually turn on, take your original filter you are tossing that the device came with. Take apart the top and bottom where those white ribbons are and under the silvery cardboard you’ll find on both sides a thin slice of cardboard with a magnet taped to it. This magnet in the filter is how the device detects if the filter is from MS. Remove this magnet and place it along the bottom of where the filter goes in in the device, move it around the bottom until you hear a beep (it should be just left of the center on the bottom). Take some tape and tape the magnet there and place in your generic filter and it should work.

I have bought these filters before. They work great at filtering dust, pollen, pet dander and pet hair. I have 4 cats and 1 dog and this filter even stops pet odor. I will continue buying these. They are great!

As the product description says, it is a replacement, when the time of use is up, replace it, good value for money, but the second one is a bit damaged, check it when you receive it.Overall it really does what it does.

Excellent replacement, perfect fit.

I love this air purifier, improved my sleep quality and Turbo makes an okay white noise. The filter on 24/7 Turbo lasted 2.5/3 months. Great overall.

I should’ve spent a little more money in these. Beware sometimes you can hear loose something in these filters

I bought it as a generic replacement filter for my air purifier because it is half the price of the original. My air purifier detects it that it’s not original because a red lite flickers all the .

It's a good value

This product is useless says it works in my membrane solutions unit but it does not. Advertises it does and now they want me to pay return shipping on a product that they falsely claim works.I live in Canada and shipping back to Los Angeles is almost same price as one filter