The 3M Ultimate FX Full Facepiece Respirator is 3M's most rugged facepiece and engineered to provide maximum comfort, durability, and visibility in the most X-treme environments. These are the only respirators designed with Scotchgard Protector to help the lens resist dirt, paint and stains, and makes it easier to clean. The 3M Cool Flow Exhalation Valve helps reduce heat and moisture buildup inside the facepiece. These reusable full facepieces are constructed with a soft, yet durable silicone material, and have a large lens to offer excellent peripheral vision.