The EliteBook 810 G1 presumably gets its name from the MIL-STD 810G, a level of abuses developed by the U.S. Department of Defense to determine field readiness. According to HP, this unit can survive 26 drops from a desk height of 30 inches onto any side, angle or edge. It's protected from incursion of sand, dust, moisture and a certain degree of liquid. It resists spills onto the keyboard by diverting the liquid away from core components and out through drain holes on the bottom. We haven't tested any of those claims yet, but as soon as we're done reviewing this machine, the gloves come off.
By the way, this rugged little machine didn't suffer too greatly in terms of size and weight. With its 11.6-inch screen, it tips the scales at an eyelash above three pounds, about the same as most 13-inch Ultrabooks. It's 8.4 inches wide by 11.2 inches long by 0.80 inches thick.