Zero Prio Running and Fitness Shoe - 10 Brand new, worn outdoors once, run a little big. Whether you’re out on a run, trying out a new trail, hitting the gym, or toeing a slackline, you’ll love the Prio’s combination of freedom and protection. “Just-Right” Protection: The Prio uses the same 5.5mm FeelTrue® rubber as our Z-Trek sandal, so you get great protection while still getting the ground feedback that your feet love. The optional 2mm insole lets you have more or less of a “barefoot feel” depending on your mood. Lightweight: A women’s 7 is only 7.3 ounces each – you’ll barely notice you have them on. Secure-feeling: Our Huarache sandal-inspired reflective heel and instep straps hold your foot securely – with or without socks – while keeping your toes free to move. Plus, the Prio is made from 100% vegan-friendly materials. Imagine you’ve just come home after a long day at work or on the trail. If you can’t wait to take your shoes off the moment you walk in the front door, you’ve been wearing the wrong shoes. Life-Changing comfort and superior performance come from using your feet naturally. That’s what Xero Shoes let you do. Natural Fit. Natural Motion. Natural Feel.