General
- Can I remove the valve from the mask?
- How long can the mask be used for?
- How often do I need to change the filter?
- What does the valve do?
- What materials and coatings are used in both of the BASIC & PRO masks?
- When will other patterns be available?
- Would it be harder for me to breathe when wearing the mask?
- You are a UK company, why are your masks assembled in China?