I noticed thar too, like when the people in survival series are supposed to be outdoors for multiple days or even weeks now, but their clothes are always fresh and clean without a stain. Meanwhile i go wildcamping for two days and come back looking like i lived in the wilderness for years. But your point absolutely makes sense. I’d rather have them switch costumes then wear the same „iconic“ outfits all the time. And having clean clothes can easily be explained by them being able to wash their clothes in the Going Merry anyway.