The Hekler combines function and style into one serious sunglass which has removable neoprene foam and anti-fog photochromic lenses.  In low light conditions theses lenses allow 88% of the visisble light through the lenses and while in bright light the lenses darken allowing 34% of visible light through the lens. The Hekler also comes with a carry case and microfiber cleaning cloth.

Manufacturer: Bobster
Frame Color: Gloss Black
Lens Color: Photochromic Grey
Photochromic Transmission Rate (Info): 88% (low light) - 34% (bright light)
Lens Material: Polycarbonate
UV Protection: 100%
Foam Type  (Info): Removable Neoprene Foam
Features: Photochromic Anti-Fog Lenses, Polycarbonate Frame, Foam Padding
Includes: Microfiber Cleaning Cloth, Carry Case
Fits Faces: M-L  [Size Info]
Warranty: One Year against Manufacturing Defects

* Note: Photchromic lenses won't generally darken behind a windshield because the glass blocks out UV rays that cause the lenses to change and will not get as dark as traditional smoked gray lenses.