BZ Optics Black One Size Urban HD Photochromic Glasses

URBAN frame with High Definition Photochromic Lens

This High Definition Copper coloured lens will change from Cat1 pre-dawn or low light to dark Cat3 as the sun intensifies and the UV increases.

Category 1 – Light tint, with light transmission at 43% to 80% - For cloudy days.

Category 2 – Medium tint, with light transmission at 18% to 43% - Good for all but the sunniest days.

Category 3 – Dark tint, with light transmission at 8% to 18% - For very sunny days.

Frame options include crystal clear, gloss coke (brown) and matt black.

The frame had a moulded, built-in nose piece.

All pairs are supplied with a case and micro fibre cleaning cloth.