The question is not whether or not you need one, it's whether or not your life could currently benefit from its possession and the answer to that question is always -always- yes.

[then the shopkeep comes out from the back and gives them the stinkeye, probably having overheard their (not quiet) conversation, to inform them that they don't have the suit in "kappa size" but tries again to ply his wares to his Kou]