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. These Xero Women's Prio Shoes use the same 5.5mm FeelTrue® rubber as their 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. The Huarache sandal-inspired reflective heel and instep straps hold your foot securely with or without socks all while keeping your toes free to move.