Air Quality - Masks
First it seemingly comes down to the fit of a mask.... if there is leakage, then it's not going to matter. (See: Nathan will rock a goatee/no beard) - sizing tool: https://cambridgemask.com/fitting-your-mask/ Vogmask and Cambridge (both ~$30) both seem like great companies, both using Nelson Labs for their testing (one of the tests happened out on Redwood Road) - with good results. ~Six months life span on each. As for more disposable... 3M may be less expensive, and as effective. Less pretty tho. ($3 each for the 9211+ or 9332+) IQAir has remarkable products, too, and they're around $7 (when buying 10) or... $5 (when buying 100). Ref 3M Aura 9332+ (1 Mask) - https://www.amazon.com/dp/B013UKCUAO/ 3M Aura 9211+ 10/Pack - https://www.amazon.com/dp/B00AEXIS4S Vogmask - https://www.amazon.com/stores/Vogmask/Homepage/page/4128603B-4DBB-4C86-9C93-F0B43AA3C704 Cambridge Mask Co https://www.amazon.com/stores/CambridgeMaskCo/CambridgeMaskCo...