Design & intent
The Boulder X is very clear about what it’s for. This isn’t a soft, bouncy trail shoe or a lightweight summer hiker — it’s a precision tool for rocky ground. The shape, stiffness and rubber all point towards control and stability rather than outright comfort.
If you’ve ever thought “I wish my boots felt more precise on this slab,” you’re exactly the target audience.
Grip & edging performance
The Vibram® IdroGrip outsole is the standout feature. On dry rock it inspires huge confidence, and even on damp slabs it performs far better than most walking shoes. The climbing-style toe profile makes edging on small holds feel natural rather than forced.
For scrambling, this translates into calmer movement and better balance — especially on ridges and broken ground where foot placement really matters.
Stability & support
Underfoot, the Boulder X is firm and supportive. There’s very little torsional flex, which helps when side-hilling or standing on angled rock for long periods. The heel cup feels secure, and the overall platform encourages deliberate, confident steps.
The trade-off is reduced comfort on long, flat tracks — this shoe is happiest when the terrain is doing something interesting.
Fit & comfort over distance
The to-the-toe lacing system allows for excellent adjustment, particularly in the forefoot. This is a big plus if you want a snug, scramble-ready fit without crushing your toes.
Comfort improves as the suede upper breaks in, but don’t expect slipper-like softness straight out of the box. These reward commitment rather than casual wear.
Durability & build quality
The Boulder X has a well-earned reputation for longevity. The thick suede upper, solid rand and robust sole unit stand up well to abrasion from rock and scree. This is a shoe built for repeated abuse rather than one-season use.
Water resistance & conditions
While the leather upper shrugs off light moisture, this isn’t a waterproof shoe. In wet grass or prolonged rain, your feet will get damp. In exchange, you get better breathability and a more precise feel on rock than most membrane-lined alternatives.
Value & alternatives
They’re not cheap, but few shoes last as long or fill this specific niche as well. If you mainly walk on soil, forest tracks or muddy paths, you’ll be better served by a trail runner or lightweight boot.
If your days involve ridges, scrambles and rocky descents, the Boulder X quickly earns its keep.