Verdict from 5 experts and 100+ user reviews

7 reasons to buy

  • Footwear critics found the Verto S4K GTX’s heel support beyond fantastic.
  • Professional bloggers were able to climb technical ascents with great precision in this mountaineering boot.
  • This gear from The North Face impressed several users with its superbly grippy outsole.
  • The flexibility of this boot, especially around the ankle, floored reputable shoe pundits.
  • One expert reviewer rated the Verto S4K GTX quite highly in terms of comfort.
  • A shoe tester by profession got an excellently snug fit in this boot, particularly around the heel.
  • This footgear was given a thumbs-up by a mountaineer for being remarkably light—a quality that is not very common for a boot of this class.

3 reasons not to buy

  • The narrowness of the Verto S4K GTX’s toe box shocked some owners.
  • Less than a handful of wearers somehow got blisters wearing this boot.
  • Its lengthy break-in period didn’t amuse a respected gear reviewer.

Bottom line

A gear that has top-notch climbing precision and exceptional heel support points heavily to the Verto S4K GTX. A boot providing outstanding surface grip is also an accurate description for this great-fitting mountaineering footwear. It is just a bit of a letdown, however, that its toe box may be too narrow for people with bulkier feet. Nevertheless, the Verto S4K GTX has what it takes to empower mountaineers and help them reach heights with heightened confidence.

Good to know

  • The Verto S4K GTX from The North Face is a crampon-compatible boot designed for mountaineering over mixed terrain. Its insulated construction lets users undertake icy adventures. Its waterproof upper is planted on a heavy duty lasting board made of polypropylene.
  • Cushioning underfoot is courtesy of the boot’s midsole. The North Face engineers gave it a TPU Cradle insert at the heel for extra stability around the rearfoot region. Slip and skid resistance, on the other hand, is thanks to the Vibram Mulaz outsole.

The North Face’s Verto S4K GTX is a generally true-to-size, high-cut mountaineering boot for men and women. It is offered in standard width in full and half sizes. Its fit may be adjusted with the use of the footwear’s to-toe lacing system with locking instep eyelets.

Enabling mountaineers to climb with adequate grip is the footwear’s Vibram Mulaz outsole. It features mostly blocky lugs lined up horizontally along its borders to give users better control during descents and ascents. A climbing zone is engineered at its forefoot to allow for precise footing on narrow ledges.

The Verto S4K GTX provides footing balance and ground protection with adequate cushioning thanks to its four-part, co-molded midsole. It has a TPU heel element for added stability and a TPU shank for additional support around the ankle region.

For extra comfort, The North Face designers gave this gear a premium footbed made of EVA, called Northotic Pro+. It is engineered with forefoot pads from Ortholite and a gel heel to improve the level of comfort it provides.

This mountaineering boot from The North Face has a sturdy over-the-ankle upper imbued with a Gore-Tex membrane for waterproofing and breathability. It comes wrapped with a PU mudguard from Smartlite to strengthen the upper further and give it sufficient resistance against abrasive elements. It is also built with an additional component at the Achilles heel called the X-Frame for extra support without sacrificing flexibility.

A pull loop is engineered at the heel to speed up on and off. Its lacing system uses combination eyelets, the top ones of which, particularly the open hooks, are made of stainless steel. Its laces, on the other hand, are made up of synthetic cords interwoven together.

  • The Verto S4K GTX is compatible with hybrid (semi-automatic) crampons.


How The North Face Verto S4K GTX ranks compared to all other shoes
Top 5% mountaineering boots
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Top 50% The North Face mountaineering boots
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The current trend of The North Face Verto S4K GTX.
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Paul Ronto
Paul Ronto

Over the past 20 years, Paul has climbed, hiked, and ran all over the world. He has summited peaks throughout the Americas, trekked through Africa, and tested his endurance in 24-hour trail races as well as 6 marathons. On average, he runs 30-50 miles a week in the foothills of Northern Colorado. His research is regularly cited in The New York Times, Washington Post, National Geographic, etc. On top of this, Paul is leading the running shoe lab where he cuts shoes apart and analyses every detail of the shoes that you might buy.