3M 6700 Small Full Face Respirator Review
Verdict: 4.4/5. The 3M 6700 is the cheapest reliable Small full face respirator from 3M — the right pick when your worker fails the 6800 fit test and the budget rules out the FF-401 or 7800S Small. Honest buyer's review with side-by-side comparisons, cartridge pairings, and a no-nonsense pros and cons breakdown.