Viaz DFS GTX redefines a new standard of multipurpose footwear for technical and fast mountaineering, demanding trekking and via ferratas

Evolution of the historic AKU Viaz model, it adopts Dynamic Fit technology that dynamically adapts the boots heel tension with your natural stride to increase comfort and stability. The Vibram Croda Litebase sole offers stability, grip and precision, even in the most technical situations, allowing the use of traditional or semi-automatic crampons. It adopts the AKU Elica Natural Stride System to promote biodynamic efficiency. Exclusive AKU Dual Fit System (DFS) technology allows to adjust fit in walking or climbing mode.

Features

• Use: Mountaineering, Via ferrata, Demanding or heavy routes
• Upper: AIR8000® + Welded PU Film
• Upper protection: rubber rand
• Lining Description: Gore-Tex® Performance Comfort
• Outsole: Vibram® Croda Litebase
• Midsole: double density PU
• Lasting board (stiffness): 6-4 MM NYLON + CARBON FIBER + DIE CUT EVA (STIFF)
• Footbed: custom fit
• Semi cramponable
• Real weight: 700 g (UK 9)

Technologies

IMS3
IMS1 is combined with an Exoskeleton construction in medium density polyurethane, which provides stability and protection, and an internal part in ultra-light polyurethane, which guarantees cushioning and high shock absorption and compressive strength.

AIR 8000
Laboratory tests carried out by Gore Tex confirm that the upper made with the exclusive AKU AIR 8000® system offers a level of breathability up to 11.5 times higher than normal standards.

GORE-TEX®
The GORE-TEX® membrane contains approximately 1.4 billion microscopic pores per square centimetre. These pores are approximately 20,000 times smaller than a drop of water, but 700 times larger than a molecule of water vapour. Thus, while water droplets cannot penetrate the GORE-TEX® membrane, water vapour, i.e. sweat in gaseous form, escapes easily.  For the footwear industry, GORE-TEX® has developed 3 specific types of laminates with specific functional properties.

Vibram
The sole must copy the anatomical and helical shape of the bottom of the AKU lasts, in order to support and enhance their anatomical and dynamic characteristics. Other aspects to pay attention to are: the reliability which must be consistent with the use for which the shoe was designed and with a view to minimal waste of material and the search for simplicity of interface/assembly between the sole and the other components of the shoe.

Performance fit
Slim and enveloping shapes for professional footwear in the Mountain segment, designed to promote precision and sensitivity when used when climbing on rock and ice. The heel has an anatomical shape designed to hold the foot and with the forefoot part which, without compromising precision at the toe, is more spacious and thus guarantees better warmth and blood circulation even during prolonged stops with the feet in the snow.

Dynamic Fit
Dynamic Fit è una tecnologia studiata da AKU che permette di adattare dinamicamente la tensione del tallone al proprio passo con un migliore comfort e stabilità.