Placing the new swimsuites in the armoire?

What use is the male top for? How does it help with swimming in any way? It's a piece of string.

I think you'll be able to store them after the event.

If you notice, you can store some of the swimsuits already, that is most likely because these are rewards from the previous years.

They'll probably allow storage of the new swimsuits once the event is over, or at least thats how they did it in XI.