Sanfiland New Upgraded 3D Cutting PM 2.5 Activated Carbon Filter, 5-layer Protection, 4.8 x 3.85 inch, 24pcs

I like these because they fit nicely in the cloth masks that have the extra area for filters. I also like the fact they give me more protection.

Very nice filter. I use them in the pocket of my cloth mask, it's a little big for my mask but i know not all cloth masks are cute from the same cloth 😂. I still use them anyways.

Although not perfect, they work pretty good for the Oakley Msk Mask. The Oakley replacements cost about $10 for 3. These are a lot more economical and they cover all exposed mesh on the Oakley Msk Mask.

No complaints here. Got exactly what I paid for. 👍

Thought this was a good idea as it would fit the shape of my masks, but unfortunately they are too large. I even measured the filter area before purchasing and these should have fit. Instead they bunch & wrinkle inside the area and make the mask uncomfortable to wear. I'll reorder the rectangular filters as they seem to be a better fit. These will just become trash. Waste of money!