Blue Light Blocking: 90%
Lens Type: Crystal Clear CR:39
Material: Custom hand made cellulose acetate and stainless steel.
Frame: Akulon-coated German screws for proper tension and durability.
About Portola Frames: Whatever the scenario, our Presidio frames with vintage inspired shape - generous, square frames will make you look great.
Lens Color: Crystal Clear.
Design: Engineered for optimal balance, comfort, and durability.
Our Presidio are considered 'Medium Fit' and are a good choice if you're unsure which size you are.
Frame Measurements: 51-19-142
Glasses measurements are generally written like this: 50-15-135. The first measurement is the eye size (width of the lenses), the second is the bridge size (distance between the lenses), and the third is the temple size.
We reccomend checking a pair of well fitting sunglasses for these numbers which are typically printed inside one of the arms. The most important measurement to match is the first which helps determine the width of the frame.