Dan F.
Effective but somewhat uncomfortable.
I have to revise my review of this mask. I think it is effective but particularly uncomfortable and scratchy feeling in warm weather. I wish the material was lighter. And when I put the filter inside it's rather difficult to place into the pocket, and once inserted, it makes the mask even more uncomfortable in the warmer weather. One of the two masks also keeps slipping over my nose, but not as much as some of the other masks I've worm. The straps are not adjustable.