Polarization on Sunglasses

When getting a pair of sunglasses it is important to know whether the one u getting is polarized to remove the UV light. Last week when i went shopping with my gf at jusco, we came across this interesting film to check whether a sunglasses is polarized. All you need to do is just used the sunglasses and look at the film and u will see some amazing stuffs back there.
without wearing any sunglasses


with sunglasses that has polarized