Solid filter material, slightly aggressive form/shape for simple cloth masks
Quality filter material and reasonably priced, but the aggressive crimp at the top and bottom of the filter (nose bridge and chin) makes it extremely difficult to slide into the filter compartment of our cloth masks. It takes some real doing to get it in there and then aligned. We end up having to rip the crimp open either partially or completely to get them to fit. That being said, on the masks that accommodate the partial crimp, the shaping does pull the mask away from your face a bit in the middle, which helps with the feeling of having cloth in your mouth without disturbing the fit along the edges.
Rating: 3 stars