I have just seen an advertisement in Australian Woodworker for the RZ dust mask. Like most dust masks they are multi fuctional and not specifically designed for woodworking. I made inquiries to RZ because I was keen to have them in my shop but wanted to test one first. They are a great concept and comfortable but didn't pass the fog-the-glasses test or, being a woodturner, fog-the-face mask test. I won't be stocking them.