Delivers minimum 20-25% more oxygen with Filterus on any mask. Clean air makes mask wearing more tolerable.

Expels significant 30-40% CO2 from behind mask (based on mask). Reduces fatigue by reducing CO2 build up behind the mask.

Reduces the heat and moisture to tolerable levels. This is especially important on hot days or when wearing a mask or when active.

A tight fitting mask and the Filterus patented snap reduces air escape from behind mask. Less fogging for eye glass wearers makes it a must.