i bought this mask last week: i'm surprised at how efficient - and surprisingly comfortable - it is. i'm wearing it in dusty situations, and it seems to work really well. if you're a claustrophobe you might find it a little disturbing to start with - but you soon get used to it, once you've found you can actually breathe! a tip for spectacles wearers: put the mask on first, then your specs, otherwise you can get the lenses marked as you pull the mask onto your face.
update: it's a really good mask - i've been using it to filter dust from cat litter - but after a while it gets harder and harder to breathe through it: presumably it's become clogged, though you can't tell that from looking at it. as i've only had it a month or two, this makes it quite an expensive mask. however, it certainly does the job.
second update: this will be my fourth buy, to date. i find the masks last at least a year, if you give them a once-over with a vacuum cleaner nozzle from time to time. excellent for keeping out dust from cat litter, if you're asthmatic. the fit round the nose is very good.
third update: i've now had five of theses masks. my only criticism of them is that the filters are non-replaceable. otherwise, they're good quality, comfortable and seal well - and keep out dust.
| Manufacturer | 3M |
|---|---|
| Part number | 4251 |
| Item Weight | 100 g |
| Product Dimensions | 9 x 32.4 x 30.5 cm; 100 g |
| Item model number | 4251 |
| Size | Box of 1 |
| Colour | Blue |
| Style | Protection |
| Material | Resin |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Special Features | Lightweight |
| Included components | One mask |
| Batteries included? | No |
| Batteries Required? | No |
