For a day that moves between pool, dinner and a flight, pick one double-layer muslin cotton romper or playsuit you can wear start to finish. Muslin dries fast after the pool, breathes through a warm dinner out and feels soft enough for hours in an airplane seat, with flat seams that won't rub on a long travel day.
A day that moves from the pool to dinner to the airport needs one outfit that can keep up, not three changes packed into a bag. Muslin cotton works for that kind of day because it dries fast, breathes in the heat, and gets softer with every wash. We picked the pieces below with exactly that kind of day in mind.