The North by Honeywell 7700 Series is the most comfortable and durable half mask available. Its soft nonallergenic silicone seal provides excellent protection, comfort and fit. The half mask cradle suspension system allows the facepiece to seal evenly on the face without creating pressure points. Its low profile gives workers a wide field of vision and does not interfere with protective eyewear. The low Inhalation and exhalation resistance of the 7700 Series makes breathing easier to reduce worker fatigue. The silicone facepiece material conforms to facial features and doesn't harden with age. Cartridges, filters, parts, and accessories sold separately..