It’s not. But while the full-grain leather upper will have more protection than our regular Prios, the Prio All-Day’s upper can be treated to provide water resistance.
Applying a leather conditioner or wax treatment, such as a natural beeswax, can help make the upper water-resistant.
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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