We don't really think that Maya have any outfits that can pass as "casual clothing" the way that casual wetlook fans would enjoy. BUT since "casual clothing" means something that somebody would wear daily, even when going to the market or grocery store, we could agree upon Maya's clothing as being casual as we know that she dresses like that every day without the need of a special occasion.
Enjoy watching Maya having a sexy session by the pool, dressed nicely.