How does the RB3686 differ from the Ray-Ban Aviator?

The RB3686 uses a square lens in a thin metal frame, while the Aviator is teardrop-shaped. The RB3686 reads more angular and modern; the Aviator is the more classic look.

Is the frame metal or plastic?

It is a metal frame, which makes it lighter than Ray-Ban's acetate Wayfarer-style models but also more prone to bending.

Does it suit round or oval faces?

Square frames generally balance rounder faces well. Try them on if you can, since the slim frame gives less coverage than oversized styles.

Are the lenses polarized?

Polarization depends on the specific lens option you choose. Check the lens description for the pair you pick, since Ray-Ban offers both polarized and standard lenses.

Is it good for sports or driving?

It works fine for driving and casual wear. For running or high-impact sport, a wrap-style frame with more coverage and a grippier fit is a better choice.