Your Greatest Fan 5 This review is being posted from the United States of America. I purchased this product because it was made in Japan and I knew I could trust the quality of the craftsmanship. I purchased this product at a higher price due to import fees and customs taxes.Here is what you should know about the product. First, the quality of the materials is top-tier. No expense was spared in manufacturing this excellent product. The components operate exactly as advertised. The respirator valve visibly moves in concert with the user’s aspiration. You can see the valve open and close as you inhale and exhale. The cinches and clasps are easy to operate and the bands can be adjusted to fit any head size. The filtration cartridges included with the cartridge are excellent in everyday use and they are not difficult to breathe through. The speaker works excellently and I have had no difficulty with the listener understanding my speech during conversation.Even when breathing very hard or quickly, glasses will not fog while wearing this mask.The variety of cartridges make this mask adaptable to working with almost any hazardous material.I have only two negative comments. First, the instructions contained one warning which did not easily translate to my native language. I think it would be better if the instructions contained simpler language so that it might be easier for a non-native Japanese person to understand. That said, I was able to follow the remainder of the instructions without issue. Second, as an American, my face is very large compared to the fit of the mask and so, unless carefully adjusted, talking can make the mask slip after it has collected moisture from breathing over a long period of time. However I suspect this would not be an issue for a person with a smaller face shape than mine. Therefore these two issues did not affect my rating of the product.I try to be as honest as possible with all of my reviews. Thank you.