Verdict from 1 expert and 6 user reviews

6 reasons to buy

  • The North Face Verto S6K Extreme was surprisingly light, according to a delighted mountaineer.
  • The warmth of this boot was commended by a couple of owners.
  • Several wearers testified to the comfortable feel of the Verto S6K Extreme.
  • An experienced alpinist praised its compatibility with crampons.
  • A handful of outdoorsmen lauded the inner boot as it was able to dry quickly.
  • A gear blogger and a verified purchaser were convinced with its climbing ability.

2 reasons not to buy

  • Most owners were disappointed with the zipper closure. They noted that right out of the box it was jammed. They had to lubricate it first for it to work fine.
  • According to a dissatisfied owner, the lacing system of the Verto S6K Extreme was not able to cinch the foot securely.

Bottom line

The North Face Verto S6K Extreme is appreciated for its comfort, warmth, and lightness. It was able to impress both neophytes and seasoned mountaineers. That said, it still earned a couple of criticisms. All in all, with a few interventions, the Verto S6K Extreme can still please those who love technical climbs.

Good to know

  • The North Face equipped the Verto S6K Extreme with technologies ready for alpine assaults. Its upper is made of ballistic nylon with a Smartlite PU mudguard that wraps the base of the boot for added durability. Its inner boot wears Primaloft insulation and Aerotherm technology to keep a comfortable environment even at very low temperatures.
  • Underfoot, it has an EVA midsole for cushioning and a carbon fiber lasting board for support. A Vibram rubber outsole renders surface traction.

A men’s-only high-cut mountaineering boot, the Verto S6K Extreme generally runs true to size. It comes in standard width and regular sizes. The inner boot’s lace-up closure permits customization of fit.

The Verto S6K Extreme from The North Face features the Vibram Mulaz outsole. It has aggressive lugs which grip on most types of terrain. Its self-cleaning ability enables it to maintain traction on varying ground conditions. A climbing zone at the toe assists hikers during ascents.

This mountaineering boot wears a microporous ethylene-vinyl acetate (EVA) midsole. It offers a cushioned ride without the bulk. For additional support, the brand’s designers incorporated a carbon fiber lasting board underfoot.

The TPU Cradle at the heel helps stabilize the user’s stride. Also, a crampon spoiler is placed at the toe area and back of the boot.

The upper of the Verto S6K Extreme wears ballistic nylon with Smartlite PU mudguard. This combination makes the boot durable and protected against abrasion. Enhancing its defense against scuffs is a SuperFabric material placed on the medial quarter.

This gear uses HydroSeal, a hydrophobic lamination which protects the foot from wet encounters. It has an integrated gaiter which employs a zip-up closure. The rubber rim at the top prevents intrusion of loose trail debris.

To keep a warm and comfy environment, the inner boot sports a 200 g Primaloft insulation. The Aerotherm technology, on the other hand, features Aerogels placed at the toe, heel and under the foot to amplify warmth. Additionally

  • The North Face Verto S6K Extreme is compatible with strap-on crampons.


How The North Face Verto S6K Extreme ranks compared to all other shoes
Bottom 2% mountaineering boots
All mountaineering boots
Bottom 1% The North Face mountaineering boots
All The North Face mountaineering boots
Bottom 2% waterproof mountaineering boots
All waterproof mountaineering boots


The current trend of The North Face Verto S6K Extreme.
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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.