The mathematical symbol in the middle of its name is the only thing remotely square about 2(x)ist, the preeminent brand for designer men’s underwear. Forget the whole boxers-versus-briefs debate: Men who take pride in every layer of their wardrobe have learned to seek out Carbon, Bold, Soy (yes, it’s eco-friendlier), and other scintillating lines from this envelope-nudging company. You’ll never again have to sacrifice comfort for style — or vice versa.