The Symons - Non-Valve Mask LARGE The Darwin PRO mask boasts

The Darwin PRO mask boasts exclusive long-lasting filter technology designed by the British Ministry of Defence

7% of bacteria

Zero valve which results in limited ventilation so not advised for high intensity activities such as running

Lieutenant Colonel Robert Blair Mayne

The Beatrix PRO boasts exclusive long-lasting filter technology designed by the British Ministry of Defence

The Symons - Non-Valve Mask LARGE The Darwin PRO mask boastsThe Symons Non Valve mask boasts exclusive long lasting filter technology designed by the British Ministry of Defence. Filtering out nearly 100% of all harmful air pollutants and viruses. Unique Lab tested British Military Filtration Technology filters almost 100% of pollution, gases, allergens, smog, and pollen Lightweight, breathable material Filters 99. 6% of all viruses and 99. 7% of bacteria Filters PM10, PM2. 5, PM0. 3 Lasts up to 340 hours of