• NIOSH approved for at least 95 percent filtration efficiency against certain non-oil based particles • Features the 3M™ Cool Flow™ Valve • M-Noseclip adjusts easily for fewer pressure points and greater comfort • Braided headbands two-strap design with dual point attachment helps provide a secure seal • Spacious and durable • Designed to increase comfort and wearability • Advanced Electret Media is designed for ease of breathing