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I really like the 3m 6500
Quick release catch to easily flip the mask down. Means you can quickly pop it down to say something, or wear it round your neck easier - which means that I actually use it way more often as I keep it round my neck when popping between dusty/non-dusty areas.
https://www.zoro.co.uk/shop/personal-protection-and-clothing/reusable-respirator-masks/6502ql-6500-series-half-mask-m/p/ZT1178337XAlso - the exhaust vent points down rather than out which I like.
There is a lot of sanding in my future - floors (if DIY), skirting, repaired walls and probably doors too, so this is a really good shout. I'll do a search but if anyone sees this and has a recommendation please don't be shy....