lavenders19:
hi. thanks for the suggestion. having checked the website, the main
protection is gas/vapour. How would they cope with dusty rubble
conditions such as demolishing walls etc.

Hi, lavenders19, please will you start to quote a little better?

That said, having just read your/JR's psot, you should just Google
for "respirator dust" or similar. You'd do well to consider a
respirator that takes various different cartridges, depending on
what they're "filtering", rather than the ubiquitous "aluminium
strip on nose and sock elastic" type. More expensive, but better.