Are the lenses polarized?

No. The lenses are CR39 polymer with 100% UVA/UVB protection, but polarization is not listed.

Will these fit a medium-to-large face?

The 56mm lens width, 19mm bridge and 143mm temples put it in medium territory. It suits most average faces; very wide faces may find the temples snug.

CR39 is a lightweight optical-grade polymer. It is more scratch resistant than basic acrylic and gives clear, low-distortion vision.

What comes in the box?

The listing covers the frame and lenses only. A case or cloth is not specified, so plan to store them in one.

Are they good for driving?

Grey lenses reduce overall brightness evenly, which works well in bright daylight. They are not polarized, so glare off water or dashboards is reduced but not eliminated.

How do they compare with a metal-frame rectangular pair?

Bio-acetate is warmer and lighter on the skin than metal, and the Comotec hinges are a step above basic barrel hinges. Metal frames are usually thinner and more adjustable.