Vibram Five Fingers KSO Trek [Barefoot] Toe Shoes

he 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:

Modifiations

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 —

Tags: 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 »

A Snowy Gobble Gallop in Vibram Five Fingers

A Snowy Gobble Gallop in Vibram Five Fingers
Dudley and his wife at the Gobble Gallop.
Dudley and his wife braved the frigid Minnesota winter to participate in a Turkey Day 5k in their Vibram Five Fingers. After the jump, read Dudley's report and find out how his Five Fingers performed in the snow!I ran my first official race in… more »

New 5K PR in Five Fingers Bikilas

Matt in his Bikilas
Matt running in his Bikilas at the Houston, TX Great Pumpkin Fun Run (5K)
Matt has a nice collection of Vibram Five Fingers that he has been wearing for quite a while. He sent us this note on how they have been working for him:Just wanted to share a quick story since I finally have a good picture with my VFFs. I wear my… more »

Father Dorn's Conversion to Five Fingers

Father Dorn's  Conversion to Five Fingers
Father Dorn's Conversion to Five Fingers
In the beginning, Father Patrick Dorn, wore traditional running shoes, but he recently switched to Vibram Five Fingers. Here is Fr. Dorn's story:I'm Fr. Patrick Dorn, priest at "runner friendly" Church of the Apostles (Anglican) in Evergreen, Colo… more »

The Women's Vibram Five Fingers KSO Trek is out!

The Women's Vibram Five Fingers KSO Trek is out!
The Women's Vibram Five Fingers KSO Trek is out!
I have some happy news for women — at long last, CitySports now has the womens Vibram Five Fingers KSO Trek in black. The KSO Trek retails for about $125 and you can get free shipping at CitySports using the coupon code BIRTHDAY (Go to CitySports)… more »

Real Men Wear Vibram Five Fingers

Aaron's KSO Treks
Real Men Wear Vibram Five Fingers
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
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 »

Volcanology in Vibram Five Fingers KSO Treks

James in the restricted zone!
Ash fills the air near the Icelandic volcano. VFF fan James was able to make it into the restricted zone.
Ash fills the air near the Icelandic Volcano. VFF fan James was able to make it into the restricted zone. James' VFF Treks provided protection from the Icelandic Volcano ash. The volcano fills the air with clouds of ash on a beautiful day in Iceland. more »

Amazing! KSO Trek Vibrams enable you to levitate off the ground!

Jesse points to his black KSO Trek Vibram Five Fingers after hiking to the summit of North Fortunate Mountain.
Jesse points to his black KSO Trek Vibram Five Fingers after hiking to the summit of North Fortunate Mountain.
Well ... maybe not, but they do make you feel incredibly light on your feet. Above photoed is Jesse atop North Fortuna Mountain in San Diego. Jesse is wearing his Vibram Five Fingers KSO Treks. I asked Jesse to share his VFF story with birthdayshoes a… more »

Two Five Fingers fans make friends in a bar

Making friends is easy when wearing Five Fingers to social settings - even easier when they're post running events as they make great conversation pieces.
Making friends is easy when wearing Five Fingers to social settings - even easier when they're post running events as they make great conversation pieces.
Logan relays a recent VFF experience he had in his KSO Treks:I ran into another Vibram wearer on Saturday during the Myrtle Beach Marathon after-party. The other fellow and his wife from upstate NY have not seen the Treks up close yet. Upon touchin… more »