This is one of my favorite features in the TerraFlex.
The huarache-sandal inspired heel strap can be used to hold your heel and ankle in place. Pull the straps through the ankle holes in the sole, and then lock them in place with the laces.
The instep straps can be used to secure your instep, which can free up your toes and forefoot to relax and function better. Use the laces to tighten or loosen them to your liking.
I'm an international ultramarathon athlete and I wear Xero Shoes for races. No blisters. No smelly feet. But I also use them as my everyday sandals (they look way cool!) and I recommend Xeros to everyone.Melissa Gosse
As a barefoot runner I’ve heard lots about huaraches but it wasn’t until Steven made me my first pair (I have two) that I understood how much fun they are to run distances in!Scott McLean
Thank you for making these amazing huaraches. I love how they feel. I forget they are there so much so I have worn them to bed a few times!Tasha Riggs
If you somehow manage to wear through the outsole on your Xero Shoes, we will replace them for a nominal cost. 
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