Reusable Filter Outdoor Masks with Respirator Valve Washable Dustmask Camouflage Outdoor Sports Masks Unisex Adult Breathable Face Masks for Pollen, Woodworking, Running, Cycling (10, carbon filter)

They were very useful for my work face masks.

Liked

Lousy vendor. I had the impression I was ordering masks with filters, but all I got were the filters!

Good product can also use these with other mask

Comfortable inside mask. Have no way ok knowing how well filter works.

Shipping took a while, but got great into the pocket on our masks

Using for my mask to stay safe.

Great protection