From the Manufacturer
Sperian Survivair Premier Plus has a triple flange design providing superior fit, comfort, and protection. This is the top of line respiratory. Three flanges provides "backup" sealing security, and silicone facepiece construction is flexible, lightweight and durable. The wide wraparound and pleated silicone facepiece fits a large variety of facial types. Strategic lateral placement of inhalation valve and cartridge ports enhances field of vision, and exhalation valve provides quick exhaust of warm exhauled air. Its easy to make secure adjustments. Comes with OV/N95 cartridges/filters. Size medium/large.