AKUÂ Hayatsuki GTX Mountaineering Boots - Men's
Designed for high-level mountaineering, the handcrafted Hayatsuki GTX mountaineering boots are waterproof and insulated to help you get through hard mixed terrain at high altitudes up to 4,500 m.




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- Uppers are constructed of high-quality 3 mm Italian Perwanger leather and elastic textile for durability and longevity
- Extra-stiff 6 mm lasting board creates an entirely rigid midsole to accommodate step-in crampons and front pointing on steep ice
- GORE-TEX Insulated Comfort linings plus additional PrimaLoft® insulation provide waterproofness and warmth in the harshest mountain environments
- Vibram® Curcuma soles are crampon compatible and designed with deep and aggressive lugs to carry you confidently over a variety of mountain terrains
- AKU Elica Natural Stride System ensures an anatomic fit to provide better stability and weight distribution across your boot sole, reducing pressure points
- AKU Custom Fit insoles with aluminum insulation further enhance warmth
- Dual-density polyurethane (PU) ExoSkeleton midsoles provide support and comfort underfoot
- Adaptive lace-lock system with micro pulleys makes it easy to dial in the perfect fit
- Rubber and Liba®Smart PU rand, toe and heel welts protect the upper and aid crampon fit
- Half pair: 2 lbs.
Imported.
View all AKU Men's Mountaineering BootsBest Use | Mountaineering |
---|---|
Footwear Height | Over-the-ankle |
Footwear Closure | Lace-up |
Waterproof | Yes |
Type of Waterproofing | GORE-TEX insulated 3-layer bootie |
Upper | Leather/nylon |
Lining | GORE-TEX Insulated Comfort |
Insulated | Yes |
Insulation | PrimaLoft |
Midsole | Dual-density polyurethane |
Support | 6 mm fiberglass lasting board |
Outsole | Vibram Curcuma |
Can Be Resoled | Yes |
Crampon Compatibility | Step-in |
Weight (Pair) | 4 pounds |
Gender | Men's |
7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
U.S. Men's | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 |
U.S. Women's | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | - | - | - | - | - | - | - |
UK | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 |
EU | 40 | 41 | 41.5 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 46 | 46.5 | 47 | 47.5 |
Foot Length (in.) | 10 | 10.2 | 10.4 | 10.6 | 10.8 | 11 | 11.2 | 11.4 | 11.6 | 11.8 | 12 | 12.2 | 12.4 |
Sizing Notes
Measurements are stated in inches.