Billabong Keep Your Cool Crop Top. Crop tops are hot. You know this. But the Keep Your Cool Woven Top changes the game with ruffle detailing at the neck and hem. But that's not all. A smocked bodice a figure-hugging fit load up this woven top with all kinds of fresh appeal. Figure hugging fit. Straight neckline. Smocked bodice. Ruffle detail at neck and hem.