Breathe Naturally - Hapf600 HEPA Carbon Filter Replacement for Holmes Air Purifiers - High Efficiency Carbon Air Cleaner Filters - Compatible with Holmes HAPF600 Series - (4 Pack Carbon Filter C)

I have tried different brands of these types of filters, and this brand has worked the best out of the two other brands I have tried. One brand fits VERY tight when sliding the filters into place, but filters okay. Another brand had some sort of mold prevention treatment. That was okay, but I did notice a very faint smell. It wasn't the smell that turned me off. It was the fact that there was any smell at all - meaning that something was going into the air. The whole point is to take things OUT of the air - right? This brand is not mold treated AND it fits really well when sliding the filters into place.I will be buying this filter going forward. I don't really care about the color because it is hidden inside the HEPA unit. [update 8/18/2018] I noticed the main product page shows this product's color as black now. It was pink before, so I don't know if the actual product is now pink or black.It is difficult to find cheaper pre-carbon filters. I have listed a couple below that I have used in the past.These work out to $4.50 per replacement ($17.99 / 4). Even though these are a little more expensive, I like these because they are a little bit more dense then other brands I have purchased.8-Pack Prefilter for HPA100 Air Purifier Activated Carbon Filter Replacement, 10.7 by 7.4 Inch $17.99 as of 8/18/2018These work out to $3.75 per replacement ($7.49 / 2). These are a little bit thinner, but also work. The advantage to buying these is that you are only buying what you need (i.e., only 2 air filter changes instead of 4 with the 8 pack), and they are a little bit cheaper.Aftermarket Carbon Filters HAPF60, Filter C, 4 Pack $7.49 as of 8/18/2018GIVE Reviews - this is my standard for writing reviews[G]enuine - This is a review that is honest, trustworthy with no reason other than to help people in the Amazon family.[I]nformational - This review needs to provide information related to this product in a concise matter.[V]aluable - This review needs to provide value to the reader such that it helps him or her determine if this product is for them.[E]nlightening - This review needs to go beyond product information such that the reader learns something they did not otherwise know.ps. Don't forget to up-vote if you liked this review, or you think this review will help others.

I like this company, the carbon filters are not see through like other after market versions

The filters fit my GE air purifier well.

I'm a returning customer they work good

These filters worked great in my Holmes purifier they fit just like the originals and seem to do a solid job at reducing odors and keeping the air fresher around the room for the price I think it’s a really good deal especially with four in the pack so I don’t have to worry about running out anytime soon they showed up sealed and clean and I had no issues getting them installed I’d definitely buy these again when I need more.

Product good

As soon as package arrived, I immediately put it to use. It made a immediate difference in my air purifier. I cut one pad into 2 inch strips and placed in my air purifier inside air filter. I noticed a good difference. Product is worth the money and it's up to my expectations. Thank you, Breathe Naturally

Fits the bill. I need to make a custom filter for my 3D printer and the size and thickness is just what I needed for this special project.

Easy to install good value for your money impressed at quality for price

Proper fit as described