MSA's Advantage 420 Respirator allows users to quickly adjust the mask according to individual needs. Testing against the proposed new NIOSH fit-test panel confirms that the AnthroCurve II multi-ethnic face-seal design adapts precisely to different head sizes and facial contours. Patent-pending UniBond facepiece helps to eliminate multiple leak paths while the textured sealing surface reduces facepiece slippage when working in hot, humid conditions. Patent-pending yoke and harness design enables quick and easy switch between lock-down and drop-down harness options.