BROWN (B): Pure brown tint is for flat or lower light conditions. Excellent for cloudy or partly cloudy days in the outdoors. Light transmission is 16%.
BROWN WITH GREEN GRADIENT MIRROR (BM): All the properties of the Brown tint but with a green mirror in only the top 55% of the lens creating light transmission of 11% in the top and 16% in the bottom portion of the lens. Two lens tints in one sunglass.
SOFT GREEN SILVER FLASH MIRROR (GFM): All the properties of the soft green tint but with a silver flash mirror.