Review on Enhanced 3M 6300 Respirator: Optimal Respiratory Protection with Advanced Features by Mark Greenwood

Not the large 3M mask I've worn for years. There's no room for a grown-up face at that size. Instead, it pinches your nose and closes your jaw, preventing you from breathing normally when using it. Larger sizes are not in stock! It is sold in adult size, and there is no way for an adult to wear it comfortably for long periods of time or breathe normally through the mouth while working, put it on. Update: This is referred to as "Non-Returnable Product". It's also a major product to be mislabeled as it's been redesigned for the occasional NGO worker cleaning Hurricanes for photo ops as the redesign doesn't allow you to actually work and pant while wearing it. It forces your mouth to close like the strap of a Kingsguard helmet, allowing only nasal breathing. And maybe provides a better seal, but makes it absolutely impossible. as advertised or as 3 million produced over decades. If you haven't bought it yet, run! If you are seriously dissatisfied with this product, as many people think, Amazon will allow returns based on false advertising. That's why we all love Amazon so much. "No" doesn't always mean "no" here, which is very important to me and that's why I keep coming back year after year.