Salomon X Ultra 4 Mid GTX Review: Fast-Light Mid-Cut for Day Hikers

Construction and Materials

The X Ultra 4 Mid uses a synthetic upper—primarily textile and thermoplastic polyurethane (TPU) overlays—wrapped in a Gore-Tex membrane for waterproof/breathable protection. The mid-height cuff extends approximately 1 inch above the ankle (measured at the heel), providing light ankle coverage without the bulk of a traditional hiking boot. Salomon's Advanced Chassis, a molded insert embedded between the midsole and outsole, stabilizes the heel and forefoot during lateral movements on uneven ground. The Contagrip MA (Mixed All-terrain) rubber outsole features 4 mm lugs in a multidirectional pattern optimized for wet rock and loose dirt.

Salomon's Quicklace system replaces traditional laces with a single-pull cord and a lace pocket on the tongue, enabling one-handed tightening and eliminating loose ends that snag on brush. The EnerCell EVA midsole provides moderate cushioning—softer than approach shoes but firmer than trail runners—balancing ground feel with shock absorption on rocky trails.

Intended Use and Performance Context

This boot targets day hikers, section hikers with ultralight base weights (sub-15 lb pack), and fast-packers who cover 15+ miles per day on maintained trails with moderate elevation gain. OutdoorGearLab's review praised its agility on technical terrain, noting the low-profile design allows quick foot placement on boulder fields and root-laced trails. Switchback Travel flagged the boot's performance on wet rock, attributing grip to the Contagrip compound and lug geometry. Treeline Review highlighted the Gore-Tex liner's breathability during shoulder-season hikes, though they noted warmth can build during summer ascents above 80°F.

The X Ultra 4 Mid sits between a trail runner and a traditional backpacking boot. It offers more ankle protection and weather resistance than low-cut trail runners but less torsional rigidity and load-bearing support than boots like the Lowa Renegade GTX Mid or Asolo Falcon GV. For comparison, a hiker carrying a 30 lb overnight pack on the John Muir Trail would likely prefer the Asolo's stiffer shank; the Salomon excels with a 10 lb daypack on the Appalachian Trail's rocky sections.

Fit, Sizing, and Comfort Considerations

Salomon uses a European last that runs narrow through the midfoot and toebox compared to American brands like Merrell or Keen. CleverHiker's review noted the snug fit works well for narrow to medium-width feet but can cause pressure points for wide feet, even when sizing up. The manufacturer does not publish a wide-width option for this model. The Quicklace system allows micro-adjustments to relieve hotspots, but the overall volume remains low-profile.

The EnerCell midsole requires approximately 20-30 miles to break in, after which the foam compresses slightly and conforms to the foot's arch. The Gore-Tex liner adds minimal stiffness; most hikers report the boot feels trail-ready out of the box, unlike full-grain leather boots that demand 50+ break-in miles.

Durability and Longevity

The synthetic upper resists abrasion better than mesh trail runners but lacks the multi-season lifespan of full-grain leather. TPU overlays reinforce high-wear zones (toe cap, heel counter), and the Gore-Tex membrane is factory-sealed rather than stitched, reducing delamination risk. Expect 500-700 miles of trail life before the midsole loses rebound or the outsole lugs wear below 2 mm on mixed terrain. Hikers who frequently scramble on granite or limestone may see faster lug wear; the Contagrip compound prioritizes grip over maximum abrasion resistance.

The Quicklace cord is a known wear point. Switchback Travel's long-term testing observed fraying after approximately 400 miles, though Salomon sells replacement kits for under $10. The lace pocket's elastic closure can lose tension after a season of heavy use, allowing the cord to slip out during bushwhacking.

Value and Category Position

At approximately $155 MSRP, the X Ultra 4 Mid GTX occupies the mid-tier price bracket for waterproof hiking boots. It undercuts premium models like the Scarpa Zodiac Plus GTX ($229) and the Arc'teryx Acrux TR GTX ($279) while costing more than budget options like the Merrell Moab 2 Mid Waterproof ($135). The value proposition hinges on the Advanced Chassis stability system and Salomon's trail-running pedigree—features that appeal to hikers who prioritize speed and agility over maximum durability.

For hikers who already own a GPS unit like the Garmin inReach Mini 2 Satellite Communicator or the Garmin GPSMAP 67 Handheld GPS for backcountry navigation, the X Ultra 4 Mid complements a fast-and-light kit. It pairs well with minimalist gear like the MSR PocketRocket 2 Stove and the Sawyer Squeeze Water Filter System, where every ounce counts toward daily mileage goals.

Best For and Not For

• Day hikers covering 10-20 miles on maintained trails
• Section hikers with ultralight base weights (sub-15 lb pack)
• Fast-packers prioritizing speed over maximum support
• Narrow to medium-width feet (no wide option available)
• Three-season hiking in wet or variable conditions
• Hikers transitioning from trail runners to light boots

Frequently Asked Questions