Designed to take on the steepest and most technical terrain you want to explore
The Hayatsuki GTX is perfect for hard mixed terrain at high altitudes up to 4,500 meters. Handcrafted by AKU in Montebelluna, Italy and designed with elite athletes in mind, the Hayatsuki is constructed with only the best materials available. The Hayatsuki boasts a rubber and Liba®Smart PU protective rand, toe and heel welts for crampons, a lining with Primaloft® eGore-Tex® for thermo regulation, a heat sealed exoskeleton, micro pulleys, an adaptive lace-lock system and a double density exoskeleton midsole.
GORE-TEX Insulated Comfort + PrimaLoft
Keep your feet warm dry in all mountain conditions with the integrated waterproof GORE-TEX Insulated Comfort+ membrane. With added Primaloft insulation, you will be sure to stay warm.
The VIBRAM Curcuma mountain sole is crampon compatible and designed to carry you through any terrain. From rugged trails to steep snow and ice, it is there for you.
Elica Natural Stride System
Our Elica Natural Stride System ensures an anatomical fit to provide better stability and weight distribution across your boot sole to reduce pressure points and encourage better form and performance.
- Lining Description: Waterproof GORE-TEX® Insulated Comfort + PRIMALOFT
- Sole: Vibram Curcuma Mountain Sole
- Footbed: AKU Custom Fit Insole with Aluminum Insulaton
- Lasting board (stiffness): 6-4 MM GLASS FIBRE + DIE CUT EVA (Fully Rigid)
- Midsole: Double Density Polyurethane Exockeleton
- Upper: 3.0MM Italian Perwanger Leather + Elastic Textile + AIR8000®
- Upper protection: Rubber Rand +LIBA®SMART PU
- Crampons: Step-In, Strap-On, Hybrid
- Resolable: Yes
- Weight: 914 Grams per Boot
- Handcrafted by AKU in Italy
I have extra wide feet 4E and after scouring the internet looking for a B2/B3 boot that would foot my feet this is the best one. Unfortunately, I had to return them as I the length is too short. But the width and feel were perfect. I tried the 12.5's & the 13's; I wear 14 4E US size. 13.5 would probably be the right fit.
I love the boots ,I love everything about them , may the lord bless you all!!!!!
Finally found a boot that fits my foot type perfectly after several years of either struggling with either heel lift or narrow forefoot area of other brands. The Hayatsuki has a wide forefoot and midfoot section, with a very secure heel cup - ideal for my generally wide foot with narrow heel. The lacing system is one of the best I have used, enabling areas of tightness or looseness with minimal effort. For reference my Mondo foot measurement was 280mm, and I went with the 285mm (US 10).