Total versatility: step-in, semi-automatic and strap-on crampons
Featuring front and rear welts, its ultra-rigid construction is fully compatible with all types of crampons: automatic, semi-automatic or strap-on. This versatility means you can tackle both ice climbing and mixed climbing with confidence. The Vibram® Impact Brake System sole provides traction and braking, while the overall stiffness delivers precise energy transfer to the toe area, reducing fatigue on the most technical and demanding ascents.
EZ FLEX detachable tongue: Anatomical precision fit
This model features the patented EZ FLEX tongue, which is fully detachable and adjustable using a rip-tab system. It allows each mountaineer to adjust the internal volume precisely to suit the shape of their instep. This modular design also ensures better moisture-wicking thanks to its stretch fabric construction, offering a level of custom comfort rarely found in a boot that is so rigid and protective for high-altitude conditions.
PrimaLoft® Synergy thermal insulation: a shield against extreme cold
Designed for extreme cold, it features a triple-layer PrimaLoft® Synergy lining. This technology provides an effective thermal barrier at high altitudes or when ice climbing. It retains body heat during static periods whilst wicking away moisture from the skin. It’s the ideal boot for demanding mountaineers operating in conditions where thermal protection is a vital priority for the safety and comfort of their feet.
Idro-Perwanger® 3mm+ leather: Water-repellent protection and natural breathability
This model is made from ultra-thick Idro-Perwanger® cowhide, treated to be water-repellent from the tanning stage. As it has no membrane, it offers superior natural breathability, reducing internal condensation in very cold weather. The silicone treatment incorporated into the fibres effectively repels moisture and snow. This is the purists’ choice for keeping feet dry, whilst offering unrivalled durability and faster drying than models with conventional membranes.
Vibram® sole and resoleable design: performance and durability
The Vibram® Impact Brake System sole offers phenomenal grip on rock and maximum shock absorption. This model stands out for its construction, which allows for full resoling. Once the rubber is worn, don’t throw your boots away: take them to a qualified cobbler for professional resoling. This way, you retain a boot that is already moulded to your foot, whilst making an economical and sustainable choice for your future years of serious mountaineering.
Ibi-Thermo insulating midsole: Barrier against cold from the ground
What sets the Nepal Extreme apart is its 9 mm thick Ibi-Thermo insole. This technical layer provides exceptional thermal insulation against rising cold from the ground (snow, ice). It perfectly complements the Synergy lining to ensure that warmth is trapped inside the boot. It is this specific midsole that has earned this model its reputation as one of the warmest non-membrane mountaineering boots in its category.
