Love the added layer of protection inside some of our already favorite masks. The filters are quick and easy to install and remove from inside the masks and seem very well made. We have been using these for over 6 months now and keep coming back for refills. My only regret is that they are not reusable...
*I have been partially compensated/motivated to leave my review with the bribe of 10% off my next order with Caraa. However, I am using that 10% off specifically to buy more universal filters for our Caraa mask collection! So the remarks are genuine.