Schutzbrille Case question.

[jrpark]

Hello, May I ask. Whats mean Umbral/Ultrasin stamp and XX%(ex: 55%, 75%)?

I will thank you if you respond me

[SMP]

Umbral 55 % is a measure of how dark the sunglasses are:

http://en.wikipedia.org/wiki/Umbra
http://translate.google.co.uk/transl...N%26start%3D10
The higher the % , the darker the glasses.

Umbral is the trade name of the Zeiss company.