MSA Advantage 420 Series Medium Half Mask Twin Port Black Air Purifying Respirator features patent-pending UniBond over-molded one-piece silicone Facepiece eliminating the possible leak paths. Respirator is rendered with user-friendly features comprising maximum comfort improved donning and fit enhanced safety and reduced maintenance cost. Respirator featuring drop-down harness position permits the user to remove while retaining head protection. Latex-free respirator minimizes the risk of adverse individual irritation and comes with textured inner Facepiece seal which reduces slippage improves fit. One-piece ComforTop cradle headband cuts down pressure points when head protection is worn. This respirator easily switches between lock-down and drop-down mode and is patterned for easy integration with other personal protective equipment. It is used in a variety of applications namely asbestos abatement welding, sanding, and grinding, painting and more.