3M6100A 3M6200A gas mask respirator protection 3M6200 3M6200 acid gas the most effective combination of gas mask, and durable. Perfect design, dual protection, advanced silicon materials, light and comfortable, not irritating to the skin, low nasal bridge, low-profile design to provide the best vision The best headband adjustment points designed to wear more comfortable, longer life, can be cleaned. Double tank filter design, filter effects better, and accessories can be replaced.