I just designed this 3D printed "antimask" to keep my face warm without fogging my glasses: https://www.thingiverse.com/thing:6438319 https://www.thingiverse.co

I just designed this 3D printed "antimask" to keep my face warm without fogging my glasses: https://www.thingiverse.com/thing:6438319 https://www.thingiverse.com/thing:6438319 Somebody suggested adding a sloping nose/mouth shield, and I said what I really needed was a heat exchanger... nice to see that they actually exist.