The Arnam’s primary weakness is that they do not handle heat well. Their dark, leathery skin resembles the blubber of seafaring creatures, though the Albion were able to keep it thin enough to give them full human mobility. It retains heat, insulating them from the deepest and coldest environs. And it is difficult to cut, protecting them from many more environmental dangers. But it retains heat when they are in hotter temperature zones, too. With so much of their design aiming at keep them warm they simply cannot dissipate enough heat to keep them comfortable in hotter climates. And an overheated Arnam is a very unhappy Arnam.