Anti Fogging sticks.

[Nos4r2]

I've been looking for these for years since buying some at the NEC weldex show in the 90's.

Anti-fog sticks

They are somewhat better than the anti fog sprays on the market
for keeping your shades/helmet visor/glasses from misting up and make water bead and run off when you get a faceful.

[codprawn]

Looks a great idea - we used to cut a potato in half and rub that on the glass - it actually worked as well but these look a bit more convenient - unless of course you keep the spud for emergency rations!!!