stupid Q about sunshades

[///Sniper535]

is it possible to make them from scratch materials?

Anyone have any idea

[attack eagle]

I guess if you have some spare polarized glass and an optical grinder and the knowledge to use it. :)

Lot easier and cheaper just to buy them when they are on sale at big 5 or some other athletic store for $35 instead of $150-$200.
:)

[///Sniper535]

where? we're talking about the roller shades right?