We also really love the thermal shock resistance because you don't have to worry as much about going from hot to cold and back again because it won't crack the glass. (geekwrapped.com)
Other features include shock resistance, data hold, and an auto power - off feature. (geekwrapped.com)
The rugged magnesium and aluminum frame is covered with a rubber coating for advanced shock resistance and optics protection. (geekwrapped.com)