Good filters, but the mask i got them for is a bit small for my head.
The ion mask is a good fitting adjustable mask that allows filters to be placed in between it's two layers. I found it comfortable to wear, but I was disappointed that it did not fit around the bridge of my nose well. It could be improved by adding flexible material across the top of the mask. I have your Takta mask and it fits very well around my face and nose.