Vibram Five Fingers KSO Trek [Barefoot] Toe Shoes

The Vibram Five Fingers KSO Trek (The "KSO" stands for "Keep Stuff Out") is the more aggressive, big brother to the Vibram KSO (Jump to posts on the KSO Trek below!). The KSO Trek's lugged sole and kangaroo leather upper make it the most trail-worthy Vibram Five Fingers model to date, providing added traction on loose terrain and snag-protection against low lying brush.

The Five Fingers KSO Trek has no arch support and only a small amount of cushioning or padding — sporting a 4mm EVA midsole, the KSO Trek is thicker than the KSO or Flow, both of which have a 2mm EVA insole. However, despite the extra thickness and the cleated sole, the KSO Trek still transmits a great deal of ground feedback, making it a fantastic "barefoot" shoe for outdoors wear.

Model specifics

Here are the technical specifications of the Vibram Five Fingers KSO Trek straight from Vibram:

The KSO Trek is a more rugged version of our popular KSO. The kangaroo leather upper and sock liner feels soft against the foot, yet is strong and tear resistant, with outstanding breathability. A 4mm EVA midsole offers plating protection from stone bruising, and a lightly cleated 4mm Vibram performance rubber outsole delivers improved traction on trails and over more rugged terrain.

KSO TREK IS BEST FOR: Light Trekking, Trail Running, & Travel.

The standout features of the KSO Trek include:

  • Closed top providing a fairly tight "seal" around the ankle. The KSO Trek manages to "keep stuff out" by way of this seal.
  • The KSO Trek has a lightly cleated Vibram sole that provides added traction running on loose, natural terrain.
  • The KSO Trek has a 4mm midsole, which reduces "barefoot feel" as compared to less built-up models like the Classic, Sprint, or KSO.
  • The KSO Trek has a kangaroo leather upper which is tough enough to withstand stray trail debris that might otherwise rip into the upper of the toe shoes. Additionally, the leather provides both a luxurious feel on yoru bare foot and a fancy look to the Five Fingers from an aesthetic perspective. A few fans even wear their KSO Treks to work!

Sizing and fit

If you've never sized your foot for Vibram Five Fingers, you need to consult the Vibram Five Fingers sizing chart (image) and measure the length of your feet as presecribed. Vibram sizing does not correspond to standard shoe sizes!

If you've sized in Vibrams before, note that KSO Treks size slightly larger than the same size in the Classic or Sprint models. So a 43 KSO Trek will fit larger than a 43 Classic or 43 Sprint. For this reason, Vibram prescribes you size down in the KSO Trek compared to the Classic or Sprint models.

Generally, it is better to size up if you're in between sizes per your foot measurements and the Vibram sizing chart — you don't want your toes bending out of lack of room! Also, the KSO Trek's closed-top design means that if you have particularly high arches or "high feet" the KSO Trek may not fit properly — also the KSO Trek is a little less stretchy on the top of the foot than the standard KSO.

Read (and see!) more about the Five Fingers KSO Trek via these reviews:


Okay, I want some KSO Treks. How much are they? Where can I get them?

The KSO Trek retails for around $125, making it the most expensive Vibram Five Fingers model available. That said, it can almost always be purchased with free shipping from online retailers. Find the Vibram Five Fingers Trek Sport in stock via the Store or subscribe by email to inventory alerts.

Looking for something else? Try one of these other Vibram Five Fingers models:

Of course, there are other barefoot shoes worth checking out!

More Vibram Five Fingers KSO Trek posts below —

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    Xero Shoes - Barefoot Running Sandals

Tag: "kso trek"

Hiking, Traveling New Zealand with KSO Trek FiveFingers (and Sprints)

Hiking, Traveling New Zealand with KSO Trek FiveFingers (and Sprints)
A photo of Jen K. and her husband in the Christchurch Botanic Gardens on the south island of New Zealand. They are standing in front of a massive Atlas Cedar tree. KSO Treks.
My husband and I had the privilege of taking a vacation to New Zealand this December with another couple for our honeymoon. We got married this past June, and decided to make our trip a memorable one. I had purchased the KSO Treks earlier this year… more »

Spyridon LS vs. KSO Trek Vibram FiveFingers

Spyridon LS vs. KSO Trek Vibram FiveFingers
What better way to compare Vibram's two trail running toe shoe offerings - the original KSO Trek (right) vs. the new Spyridon LS FiveFingers - than to wear one on either foot and go for a muddy trail run?
A comparative review of the new FiveFingers Spyridon LS trail running shoe versus the original KSO Trek FiveFingers from Vibram. more »

Review: Women's KSO Trek

Review: Women's KSO Trek
Justine at Lake Tahoe in her KSO Treks.
Consultant Justine Lam was instrumental in putting together Ron Paul's online fundraising campaign. She is also a big fan of Vibram Five Fingers. You may remember the interview she did about her KSOs here on BirthdayShoes. Now she has put together a revi… more »

Vibram Five Fingers Help with Plantar Fasciitis

Vibram Five Fingers Help with Plantar Fasciitis
John running in a local Turkey Trot and trail running in the Coronado Mtns, AZ.
John sent us the following story about how Vibram Five Fingers have helped him solve his plantar fasciitis problems:Listen up kiddos. I have major feet problems, plantar fasciitis and the Army gave me inserts, which gave me Stress Fractures. Told m… more »