40pcs Adults Size Adaptive Activated Carbon Fabric Filtration 5-Layer PM2.5 Filter Pad Insert Value Pack DIY Craft Anti-Dust Anti-Haze Anti-Pollution for Outdoor Activities for Men Women

Great product. I put these in my washable masks.

Have used these for four years work well

Yes thickness work sprefect with my other mesk

Easy to use and easy to replace with my cotton masks and helps keep me warm as well.

We have many masks and most have some type of pocket into which these fit fairly easily. Inexpensive enough to regularly change and would seem to be a substitute for the wearing of two masks. I am not an epidemiologist nor do I play one on TV, but from what I understand about the two mask advocates, the issue is the layers of material between the wearer and the outside world.

Buena calidad.y me llegó a tiempo

Great to add to a mask for more protection. Great value and piece of mind

These seem really small. I think the adult size filters fit the pockets in my child's masks. Skip the kids sized for kids and buy the adult and then there will be actual coverage.