RZ Mask Cap

This thing is a cap that replaces the valve in RZ and similar masks with a 25mm hole. It helps make the mask compliant with mask regulations that prohibit the use of masks with valves. You may still have to argue the point, but it should let you use your expensive, superior mask in places with tighter regulations.

I designed the top as low profile as possible so that you can print the cap in the same color as your mask and draw less attention to the fact that your mask originally came with valves.