That doesn't matter at all, in a completely made up world the fashion is decided by the creator of that world. It's ridiculous to think what you consider normal in real life is going to be the standard for a game set in a fantasy world. Obviously it's serious or not everyone in the game world would dress so strangely. It can be visually unappealing to you, you can even think it's impractical if you like (kind of dumb though considering they make no mention of it being so, nor does it look like it impedes their movement at all), but if you're not prepared to suspend your disbelief for a fantasy game then you can't blame the creators.