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Respro® UK on Twitter: "All the materials used in the Respro® Allergy Mask are known to be inert and unlikely to cause an allergic reaction. The mask is ultra light-weight and air-permeable
Respro Masks - Will a beard affect the performance of a mask? Any beard will interfere with the sealing of a mask, it goes without saying. How much leakage is governed by
![Amazon.com : Respro Techno Mask Replacement Filter - Medium (2-Pack) : Airsoft Masks : Sports & Outdoors Amazon.com : Respro Techno Mask Replacement Filter - Medium (2-Pack) : Airsoft Masks : Sports & Outdoors](https://m.media-amazon.com/images/I/61FNWO2w76L._AC_UF1000,1000_QL80_.jpg)