Originally Posted by benzy2
...How does the Proto Switch compare to the original Dye Invision from a size/feel point of view? ...
I haven't owned a Switch, but IMO the Proto Axis Pro is like a slightly tighter fitting i3 with a quick-change lens system.
Also, if you can change the lens in the original Invision, the JT Spectra lens system will be a snap. Invision/i3 = hardest lens to change ever.
Check out the new Empire Vidar or a JT Spectra ProShield. You may also want to look at the Profiler since it offers good protection and a quick-change lens. I also recommend the Helix with thermal lens. We sell a lot of them at my field - best mask for $40.