Now there's a revolutionary one-mask system that can adapt to a wide range of respiratory applications. Available in single-port and twin-port models, this remarkable facepiece works with air-purifying respirators, supplied-air respirators and powered air-purifying respirators. Plus, it offers a long list of benefits, including more simplified fit tests, cost-savings and reduced inventory. Simply choose the adapter and components that best fit your needs and lock into place. It's that easy. And like all MSA products, the Advantage 4000 Facepiece has undergone rigorous safety testing. The Advantage 4000 Facepiece is available in both silicone and Hycar, and works with three different interfaces – Push-to-Connect (PTC), RD40 and the Twin-Cartridge Adapter. It also comes in three standard sizes to ensure a perfect fit. In addition, options include either a rubber or net harness, and every mask comes with a standard nosecup for reduced fogging in low-temperature or high-moisture environments. When it comes to safety and protection, the Advantage 4000 Facepiece covers all details, and provides the versatility and durability you need to go face-to-face with a world of environmental hazards.