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"

Real Men Wear Vibram Five Fingers

Aaron's KSO Treks
Aaron sent us this cool pic of him in the machine shop with his Vibram Five Fingers KSO Treks surrounded by metal shavings and had this to say about it:Don't tell OSHA! I've been wearing my Vibram Five Fingers in the machine shop for over 2 weeks now… more »

X-Rayed Vibram Five Fingers KSO Treks

X-Rayed Vibram Five Fingers KSO Treks
Vibram Five Fingers Fan, Tyson, recently went in to have his foot checked and left with an x-ray of his foot. Oh, his foot was still in his KSOs! Tyson gives us the run down:I went in, because I've had pain on the outside of my right foot for some… more »

Interview with Patrick Sweeney, Winner of the Palos Verdes Marathon

Ultra Marathoner Patrick Sweeney
Patrick running in the Orange Curtain 50k wearing his Vibram Five Fingers KSOs
We recently interviewed Ultra Marathoner and barefoot runner, Patrick Sweeney, who, in what may be the fastest marathon ever run in Vibram Five Fingers, recorded an awesome time of 2:37:14 winning the Palos Verdes Marathon. He ran in Vibram Five Fingers… more »

Aussie Vibram Team Five Fingers Takes on The North Face 100

Team Five Fingers runner Jase
Team Five Fingers runner, Jase. working his way up Narrowneck pass. Jase ran the TN100 in Trek Sports. The team also wore Zensah calf compression sleeves and X-bionic Fennec tops and shorts.
Last Saturday, the Australian Vibram Team Five Fingers completed the The North Face 100, a 100Km race through the Blue Mountains.Team member, Max, comments on the race:The four team members were Max and Sally, wearing KSO Treks, and Scott and Jase… more »

Vibram Five Fingers KSO Treks Provide a Firm Footing at the Homestead of the Rocks

John sports his "cool slippers" in Ballinskelligs.
Vibram Five Fingers fan, Mike, recently toured Ireland in his VFF KSO Treks. He and his wife are pictured here in Ballinskelligs, which means "Homestead of the Rocks".
Mike comments on his trip to Ireland and how he found out about Vibram Five Fingers:I just got back from a week in Ireland on March 20th. I enthralled the Irish populace with my "cool slippers". From Dublin to Ballinskelligs, they were a hit, rain… more »