BS-03 True HEPA Replacement Filter

good gift to my parents for Christmas

I can't believe you actually solicited a review. You have to know what you're selling. As I originally thought to myself when I ran across the Partu Air Purifiers; there is no such thing as a $15.00 True HEPA air purifier, and accordingly, no such thing as $7.00+ True HEPA filter, unless they're being all but given away. When held up to light, one can clearly see through the filters, even the ridiculously sparsely spaced charcoal nuggets. I've seen a number of true HEPA filters; none of which I could see light through. Most significant is the fact that there is NO certification label, stamp, or QC sign-off on the filters. I bought the so-called air purifiers for my sister. They are not worth the return shipping costs, so I guess I'll keep them, & consider the purchase a learning experience - will stick w/my gut assessment next time. I highly recommend you remove the "True HEPA" or anything related to HEPA filter standards, from your packaging. There are a lot of litigious folks with money & time to spare; you will eventually end up in court over this false advertising.