The Nightingale PRO, Stripe Blue Black Line Face Mask, Washable and Reusable FFP2 Mask In aid of our country’s front-line heroes, we have reflected the familiar signature NHS Blue in our Nightingale design. The curated combination of the blue hues and the heritage houndstooth print signifies the strength, trust, and wisdom that our leading health care workers embody. Endlessly stylish whilst ensuring both maximum protection and comfort. Unique Lab tested British Military Filtration Technology filters almost 100% of pollution, gases, and bacteria, and viruses. Ideal for people at risk of respiratory diseases, living in or traveling to areas with high air pollution/smoke levels. Protection against harmful gases, odors, all PM; PM2.5, PM0.3, pollen, smoke, allergens, and pathogens. Presented in an eco-friendly box for storage, fashion-friendly designs available in 5 sizes suitable for the whole family!