Premium 3-layer disc filters are engineered for easier breathing, making them ideal for tough work environmentsAdvanced electret filter media efficiently captures particles in 3 layers of filtration, compared to five layers in traditional filters, resulting in easier breathing while still offering the same level of protectionNetting construction technology increases durability for a longer lasting filterIdeal for physically strenuous work areas and environments, or anywhere workers prefer a product with easier breathing characteristics, toughness, and longevity