Tropicana II Seashell Shimmer Step Up Sandal from Bobux. The Tropicana sandal has a crossed strappy design, with an upper made from fast-drying leather. The padded heel provides extra comfort, whilst the ankle strap allows for a secure fit. The cut outs act as vents, allowing for airflow and breathability during warm days. The simple design will keep feet both cool and comfortable during the summertime.