Designed to help protect your workforce from certain airborne contaminants when used with 3M cartridges and filters, the 3M Ultimate FX Full Facepiece Reusable Respirator FF-400 Series helps protect your employees from many respiratory hazards in a variety of environments.Durable, versatile protection Designed with a large lens that's hard coated for scratch resistance, the Ultimate FX FF-400 respirator offers a wide viewing area for many applications.The FF-400 reusable respirator has a speaking diaphragm for easy communication. The six-strap head harness is designed to withstand tough work conditions. This full face respirator is compatible with a wide range of bayonet-style 3M filters, cartridges, and powered and supplied air systems, making it a go-to choice for health and safety managers. Premium comfort We designed this respirator with a soft, flexible silicone nose cup and face seal so your employees can stay focused on the task at hand. A comfort cradle helps position the head suspension more comfortably on the back of the wearer's head. We also equipped this facepiece with our proprietary 3M Cool Flow Exhalation Valve.