User blog comment:Avatar226/S-Class Contest/@comment-7577835-20131214115122/@comment-7418318-20131214172208

To elaborate a bit: The training with Ur was done in underwear outside on snowy mountains or while bathing in ice-water. Which resulted in both his resilience (or even unawareness) of the cold, his unconscious stripping habit and the counscious one (he almost always takes his shirt off intentionally when getting serious in a fight).