Using the well-known Hans Rudolf silicone mask that is sterilizable and reusable.
If you already have the mask, just buy the adapter and filter.
This C-Virus mask set includes the face mask, headgear, filter (2)and mask to filter coupler.
All items may be purchased separately.
Standard face piece is size medium, other sizes may be substituted at no extra cost.
No item is returnable.
Last Updated: 30 Mar 2022