I have 2 Nike Prestos, the Zip and Gym model. They are hands down the most comfortable shoes I've ever worn and not to mention the lightest. These weigh less than most of the sandals in my house and are vented rubber mesh so they feel like you're just wearing socks. The rubber soles on the zip are so soft it feels like you're not wearing shoes at all, not to mention the futuristic innovative designs. I highly recommend anyone to demo them... I feel like climbing walls and running from chickens when I wear them.