XERO Shoes TerraFlex Hiking Shoe

By Jason Boyle


TerraFlex Hiking Shoe – Photo Courtesy of the Xero Shoe Website

Xero Shoes was founded by Steven Sashen and his wife Lena Phoenix in 2009.  The idea came to Steven after getting back into running and reading the book Born to Run.  I would offer more, but there is a great video and story on the Xero Shoes website that does a great job explaining their story.  Xero Shoes offers Sport Sandals, shoes and boots, and Huaraches with a foot shaped design and minimal materials to mimic barefoot walking. They offer a ton of material including videos about the benefits of barefoot walking and running.  I recommend reading information for and against barefoot walking and running before trying it yourself.

I will be reviewing the TerraFlex trail running and hiking shoe.  The TerraFlex is based off of Xero Shoes Prio running shoe with a few newly added features.  They describe the additions this way “we added a lugged sole for grip, and embedded 3mm of Barefoam™ inside the sole for extra protection and comfort. Plus, a durable Tough Tek toe bumper and more aggressive breathable mesh upper.”  Like the rest of their website – there is a great video describing the TerraFlex, and I recommend watching it. They claim that the TerraFlex run a half size small and they retail for $99.99.


TerraFlex sole Photo Courtesy of Xero Shoes Website

I really didn’t know what to think when I first tried them on.  I already choose to wear zero drop footwear so that didn’t really changes things for me.  I had the luxury of trying on a 9, which is my normal size and a 9.5 and as their website recommends the 9.5 was the better fit of the two shoes. The toe box is wide with plenty of room to wiggle my toes.

I did a short walk in them and I like how they felt.  I can definitely feel everything that is under my feet – rocks, grass, sticks, all of it.  There is no real torsional structure to the shoe, as it can be rolled or squished up.  However, it does have reflective fabric straps that allow the midsole to be tightened down and reflective heel straps like a Huarache sandal to lock the heel in.


On a break in hike at the Woodlands Conservancy

I am interested to see how they hold up over the test period.  I am battling some Achilles tendonitis so this review may take longer than normal. I plan to use the TerraFlex hiking, trail running, and for daily wear.  Most of my use will take place in the Southern United States.  I plan on testing their durability both of the upper and the sole.  They have a 5000 mile guarantee on the sole, and I don’t envision putting that many miles on them, but will get enough to get a feel for the durability of the sole.  I am also interested in how well the lugged sole works in muddy conditions, and to see if my running or walking gait changes as I use the TerraFlex.

Update – Xero Shoes TerraFlex August 11, 2018


Upper and sole wear on the Xero Shoes TerraFlex after 100 miles of use

I have put over 100 miles of use on the TerraFlex by XERO shoes over the past several months.  My use included daily hikes on the paved Mississippi River Levee near my home, hiking and trail running at the Woodlands Conservancy in Belle Chasse, LA, hiking around Grand Isle State Park, running a beach half marathon on the sandy beaches of Grand Isle, LA, and hiking and camping at Buccaneer State Park on the Gulf Coast of Mississippi. I have experienced mostly hot and humid summer weather that dominates the Southeastern United States along with heavy afternoon thunderstorms.

I generally evaluate footwear on comfort, durability and functionality.  I will start with the comfort of the TerraFlex.  I find that they are comfortable, but it definitely took some time for my foot to adjust to the shoes.  The shoes feature the 3mm of Barefoam, but I still felt like I was almost walking barefoot.  I could feel every twig and rock no matter where I was walking.  The Barefoam and sole dampened the sharpness of trail debris but did not hide it.

Xero Shoes TerraFlex

Enjoying the view from the observation tower at Grand Isle State Park.

The toe box is nice and wide. I never felt like my toes were squished in the shoe, even after wearing them all day hiking around Grand Isle State Park and then running a half marathon on the beach at sunset.  The Huarache style straps allowed me to get a snug midfoot and heel while still allowing more flexibility in the rest of the upper.

Other than some light trail running and the half marathon on the beach, I did not run all that much in the shoes. My Achilles recovery has taken longer than I expected, but I did use them to hike frequently.  I say this because I don’t feel like I ever made a transition or change in my running style while wearing the shoes.  I still feel like I heel strike while hiking in the shoes, but I am conscious of this and trying to work on changing my gait to more of a forefoot strike.

Durability has been great.  Over 100 miles of use, and the TerraFlex are still in good shape.  The upper looks brand new with no significant wear. I am not surprised, most of my use has been on relatively benign trails.  The sole is also holding up well. There is some superficial wear on the triangle shaped lugs but nothing that affects the performance of the shoe.

Xero Shoes TerraFlex

The reflective strips on the Xero Shoes TerraFlex are bright!

The functionality of the TerraFlex is good.  I have been please with the performance on pavement, muddy swamp trail and beach running. The lugs provided decent traction on the muddy trails at the Woodlands Conservancy.  They provided traction but took a little getting used to because I definitely slid and slipped a bit.  The lugs were perfect for the hard pack sand in Grand Isle.  The tight knit upper also did a good job keeping sand out of my shoes on the beach and did a fair job of not letting Gulf of Mexico water through the upper when I got caught by a wave or had to cross a seep running across the beach.  The tight knit upper also limited breathability.  My feet stayed warm with or without socks although I never experienced any blistering.

As I mentioned earlier, I can feel every rock or twig through the sole of the shoe, so I am not sure that I would choose to wear them on rockier terrain until my feet have toughened up.  I don’t feel like I am there yet, but I have a trip in the Sierra’s coming up and I plan to take them along to see how they do.

Thanks for reading my update.  Check back to see how the XERO Shoes TerraFex perform in my final update.

Special thanks to 4alloutdoors.org and Xero Shoes for providing the TerraFlex for the review.