Browse through the complete range of cartridges, and choose the appropriate protection for your application. The unique "Saf-Twist" design, exclusive to US Safety, attaches quickly to ANY US Safety half-mask or full face air-purifying respirator facepiece. Enjoy improved visibility and faceshields or welding helmets to be worn without interference, thanks to the offset connector. With U.S. Safety filter/cartridge configurations, you can easily and inexpensively re-configure your protection for use in different applications, which will simplify your inventory.