Description

AKU Superalp NBK GTX – Heavy-Load, Long-Distance Hiking Boots

Superalp NBK GTX delivers top-range comfort and protection for true backpackers who cover long distances—often solo and with heavy loads. A 2.6 mm nubuck upper, full rubber rand and GORE-TEX® Performance Comfort lining keep your feet sheltered, while the dual-density PU in the IMS3-Exoskeleton sole provides class-leading cushioning and shock absorption on rough terrain. Also available as the Superalp NBK LTR version, featuring a high-quality full-grain leather lining.

Aim of the Product

To offer maximum protection, stability and comfort for multi-day treks with heavy packs—without excessive weight—so hikers can move farther with less fatigue.

Audience

Serious backpackers, thru-hikers and trekkers tackling uneven mountain trails with substantial loads, who demand European-made durability, waterproofing and biomechanical support.

Product Use

• Multi-day backpacking on rocky, rooty, muddy, or snowy trails.
• Heavy-load trekking: stiff lasting board + IMS3 cushioning reduce strain over distance.
• Cool/variable climates—GORE-TEX® Performance Comfort balances insulation and breathability.

Specifications & Technical Details

• Upper: Nubuck 2.6 mm
• Upper protection: Rubber rand
• Lining: GORE-TEX® Performance Comfort
• Outsole: Vibram® Fourà
• Midsole: Double-density PU
• Lasting board (stiffness): 6–4 mm nylon, 10% carbon fiber, die-cut EVA (stiff)
• Footbed: Custom Fit IMS
• Weight (½ pair): 810 g
• Size range (UK): 3 – 13

Traceability

AKU discloses raw-material origins (may vary by colour/version):

• Synthetic Upper Material: ITA
• Leather: ITA
• Rubber Rand: ITA
• Synthetic Lining Material: CHN, ITA
• Outsole / Midsole / Lasting Board / Toe Cap / Heel Counter / Laces / Metallic & Special Metallic Parts / Ribbons & Webbings / Yarns / Box / Packaging: ITA
• Footbed: ROU
• Upper’s Glue / Glue for Lasting Process: DEU, ITA
• Padding & Reinforcement Materials: ITA
• Hangtags: CHN, ITA, KOR
• Others: ITA, ROU, TWN

Manufactured in Europe.

Other Useful Information

Technologies

• IMS3 – Internal Midsole System: Medium-density PU Exoskeleton for stability & protection + ultra-light PU core for cushioning, high shock absorption and compression resistance.
• GORE-TEX® Performance Comfort:
  • Moderate insulation for cool, variable temperatures
  • Optimal breathability/insulation combo keeps feet warm & dry
  • Long-lasting waterproofness
• Vibram® Fourà: High-traction lug pattern for mixed mountain terrain.
• Anatomical Fit: Comfortable, enveloping trekking last that boosts stability and dynamic walking on uneven ground.
• Exoskeleton Technology: A medium-density PU framework integrated with lighter PU to:
  • Enhance stability and support, especially under heavy loads
  • Improve fit and control on rough terrain
  • Reduce foot/leg fatigue on extended treks

Glossary

• Rubber Rand: Protective strip wrapping the boot for abrasion resistance and added sealing.
• Double-density PU: Two-layer polyurethane midsole tuned for cushioning & durability.
• Custom Fit IMS Footbed: AKU’s comfort footbed integrated with the Internal Midsole System.
• Carbon Fiber in Lasting Board: Adds stiffness with minimal weight.

Size Guide

For a precise fit, please consult the AKU Size Guide.

Manufacturer

Made in Europe using carefully sourced components from Italy, Romania, Germany, China and other regions (depending on colour/model). AKU discloses raw material origins for maximum transparency.

Manufacturer Information

AKU Italia srl
Via Schiavonesca Priula 65
31044 Montebelluna (TV), Italy
VAT & CF: 04295240263 | REA: TV-338480
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.