It used to be when you buy a running sandal from Xeroshoes, you'll either be sent 2 pieces of rubber and 2 strings to tie however you like or the same but already mostly tied for you. It's not difficult to tie the strings to your liking if you can follow the instructions available on Youtube but that extra hassle can be a turn-off for a lot of people. Introducing the Sensori Venturi by Xeroshoes. It's a ready-to-wear, huarache-inspired, barefoot running sandal that's a joy to wear running - just like the original Xeroshoes but with the addition of a heel cup that keeps your foot from sliding left and right and keeps debris from getting under your feet. The laces are significantly improved with cushioning on certain parts for a more comfortable experience.