4 ms·
I've seen one person riding with something that looked like a gas mask. It appeared to have a "bane" like square filter near the mouth. Not just a simple N95 ma
by jhpankow 10y ago
I've seen one person riding with something that looked like a gas mask. It appeared to have a "bane" like square filter near the mouth. Not just a simple N95 mask.
- flat6turbo 10y agosome people use these for low oxygen training.