A superior filter
These filters are great! I appreciate that they have 5 layers with one being a carbon layer. Also, in my pictures I tried to show the size of this filter in comparison to my mask. When I put this filter inside the pocket of my mask, it covers my mouth and nose completely and gives shape to my mask, unlike some other smaller filters that seem to move out of place easily. I don't notice any difference in my ability to breathe or in how hot my mask gets as compared to using other filters, and I feel much more protected with this filter. I'll be buying these from now on!
Rating: 5 stars