Review on Eco 420 Personal Air Filter: Aluminum Air Purifier with HEPA and Carbon Filters for Superior Air Filtration. Eco-friendly Solution to Save Money and Reduce Plastic Waste. by Angel Packer

If you need a personal air purifier look elsewhere. Replaceable filters just aren't enough anymore and I'm by no means an active user. You will feel resistance using this product until one day in the very near future it completely clogs you up and shows up on your face. I took the filter apart and it seems to be packed too tightly. The top part (which comes into contact with the unfiltered air first) was completely covered in particulate matter, while the bottom 90% was pure white and appeared not to be filtering anything. This was after a week of use at a frequency of 3-4 times a day and cleaning the external parts every day (according to the instructions). If this is the estimated shelf life of the product then I might be a chump but at this price I feel like it's not very good value at all. I will say that the device is well built and otherwise has a nice design. The filter needs work, and in its current form it's not worth it. I've had better luck with other brands of personal air purifiers.