"I already have the Drager from last year's hedge spraying, but Screwfix don't sell the chemical (ABEK1) replacement filters for it anymore. So I bought this. Big mistake.
I wasn't convinced that it was airtight and no amount of tightening, loosening and just plain fiddling worked. I found the hard plastic parts of the mask pressed on both the bridge of my nose and my chin, which was irritating. I've a fairly average face, or so I've been told.
Contrast with the Drager. Airtight and comfortable."