I need to resupply pretty quickly - DS1 has an event mid-week that is far riskier than we've been doing - and we're in the midst of a significant surge here in MI. I need prime shipping or local availability, but cannot manage to find one that seems like a solid choice. We've been using Powecom KN-95s, but they aren't shipping in time from Amazon.

Any tried and true suggestions?

He'll be at a 4 day Model UN conference. Vaccinations and masks are required, but I'm not loving this, at all. It is super important to DS1 and is the first thing that he's really advocated to not miss. Ugh!