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X Ultra 4 Mid GORE-TEX

The Salomon X Ultra 4 Mid GORE-TEX occupies the sweet spot between an aggressive trail runner and a lightweight mountain boot. Over the past decade, the X Ultra line has defined the fast-and-light hiking category, and this fourth iteration doubles down on nimble footwork without completely ditching stability. It is purpose-built for hikers who prioritize pace and agility over the rigid, bombproof shielding of traditional leather footwear. Salomon achieved this balance by paring back upper bulk

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Topic summary

The Salomon X Ultra 4 Mid GORE-TEX occupies the sweet spot between an aggressive trail runner and a lightweight mountain boot. Over the past decade, the X Ultra line has defined the fast-and-light hiking category, and this fourth iteration doubles down on nimble footwork without completely ditching stability. It is purpose-built for hikers who prioritize pace and agility over the rigid, bombproof shielding of traditional leather footwear. Salomon achieved this balance by paring back upper bulk

Key takeaways

  • GORE-TEX waterproof, breathable membrane
  • ADV-C Chassis optimized for lateral stability
  • Contagrip MA outsole with deep chevron lugs
  • Active Support articulated wings for midfoot lockdown
  • Protective molded rubber toe cap
  • Trail-runner agility combined with dependable lateral chassis stability

Intended uses

  • Fast-paced day hiking
  • Ultralight weekend backpacking
  • Muddy and wet trail conditions
  • Technical rolling terrain

Verification notes

Evidence: expert reviewed. Last verified October 16, 2026.

Catalog photo
Real product photography — no AI-generated or placeholder imagery.

Editorial take

Built for hikers who want the nimble step of a trail runner alongside moderate ankle coverage, this boot sits at the sweet spot of fast-and-light mountain travel. It caters directly to fastpackers and weekend backpackers carrying modest base weights who find traditional leather boots overly stiff and exhausting over long mileage. The design strips away unnecessary bulk while preserving the trail-ready shielding required for root-strewn paths and rocky descents.

Salomon constructed this iteration around their updated ADV-C Chassis, which reinforces the outer foot to prevent ankle rolls without locking down natural forefoot flexion. Paired with flexible support wings connected to the lacing system, the midfoot security is exceptional and minimizes internal heel slip. Beneath the foot, deep chevron lugs molded from an all-terrain rubber compound deliver tenacious traction in slick mud and loose dirt. The Gore-Tex liner fends off shallow creek crossings and morning dew, though as with any mid-height waterproof boot, water will breach the collar if submerged too deep.

Compared to burly traditional backpacking boots, the trade-off is longevity and load-bearing rigidity. The soft synthetic upper and relatively lightweight midsole will pack out faster under 40-pound loads on abrasive scree fields. However, for hikers moving quickly with well-dialed kits, it remains one of the most capable, confidence-inspiring lightweight mids available.

Best for

  • Fast-paced day hiking
  • Ultralight weekend backpacking
  • Muddy and wet trail conditions
  • Technical rolling terrain

Not ideal for

  • Midsole cushioning can feel overly firm under heavy multiday pack loads
  • Flexible mid collar offers weather protection rather than rigid support
  • Narrower fit through the midfoot can crowd higher-volume feet
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Verified specifications

Key features
  • GORE-TEX waterproof, breathable membrane
  • ADV-C Chassis optimized for lateral stability
  • Contagrip MA outsole with deep chevron lugs
  • Active Support articulated wings for midfoot lockdown
  • Protective molded rubber toe cap

Warranty and repair information: contact Salomon directly for the most current terms.

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Data sources & verification

  • Last verified: 10/16/2026