These UV400 aviator style photochromic polarized sunglasses work day and night. Not only photochromatic, but they are also polarized.
These will not darken in your car, as the windshield blocks out most UV light nor indoors with ordinary lighting as the lighting in daily use does not contain UV light.
The frame is made of an alloy and lenses material is TAC, a new lens technology formulated for superior visual and polarization clarity and made with a scratch-resistant coating and block 100% harmful UV rays up to 400 nanometers. They are unisex, very lightweight and highly impact resistant. Lens Width: 63mm.