This mask is completely equivalent to 3M 6800 comprehensive protection function, can used 3M filter cotton, high quality products Features: Full Facepiece Respirator Large lens for wide field of view Lightweight, balanced design Silicone faceseal for greater comfort and durability Introduction: Three in one function:air humidifier, air filter and oil-water separator, so your air compressor don’t need an oil-water separator when you use your this set of air supply. The air is from the air compressor which is placed in pollution-free environment. So it avoids direct contact with poisonous gas, fundamentally solves the difficulty in breathing. Besides, you don’t need the cartridges and the filter cottons and you also don’t need to change them when they are out of work. Mask when using the internal formation of positive pressure, making the external toxic gases will not enter, mask to keep internal air circulation at the same time, solved the fuggy environment difficult to breathe and sweat! This set bring you safe and convenience. This system is equipped with air humidifier, air filter and oil-water separator, so your air compressor don’t need an oil-water separator when you use your this set of air supply. It is very safe for you. You can breath more safely and comfortably. No need of the cartridges and the filter cottons 4. Clean air continuous circulation, breathe easier! About Feedback If you are dissatisfied for any reason, please do not be quick to leave negative/neutral feedback.