Men's Nunn Bush Rio Vista 3-Strap Outdoor Sandals If you need a sandal that can keep up with your adventures this summer, then the Rio Vista 3-Strap River Sandal is exactly what you're looking for. The hook-and-loop strap helps to give you a secure fit so you can go out and do whatever outdoor activity you want, while the neoprene lining helps to manage moisture, keeping you dry and fresh. The contoured EVA footbed combined with the lightweight EVA/rubber outsole provides you with the most comfortable step.