The Burt Non-Valve boasts exclusive long-lasting filter technology designed by the British Ministry of Defence. Filtering out nearly 100% of all harmful air pollutants and viruses. Filters air 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 active use (3 – 6 months) Ideal for air travel, grocery shopping, and crowded places Zero valve results in limited ventilation so not advised for high-intensity activities such as running, cycling, or other sport. Adjustable ear loops with toggles for a secure snug fit Presented in eco-friendly packaging for storage Head-straps and Nose-foam are included. Valve Deactivator is not included.
