Description
WANT FASTER VENTILATION AND REDUCE ENERGY TO EXHALE?
UPGRADE - Do It Yourself Exhaust Valve
1 - Exhaust Valve (cut opening into outer layer of mask only)
Opening size of "Quarter" - Found in your pocket change;)
WANT FASTER VENTILATION AND REDUCE ENERGY TO EXHALE?
UPGRADE - Do It Yourself Exhaust Valve
1 - Exhaust Valve (cut opening into outer layer of mask only)
Opening size of "Quarter" - Found in your pocket change;)
