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In the new version IV, the Ultra Fastpack is much better. Incorporates innovative waterproof and breathable FUTURELIGHT & trade; technology. Thanks to the nano-yarn membrane, the fabric offers exceptional breathability so that you can benefit from a waterproof shoe to walk without getting hot or sweating, whatever the weather.
They feature OrthoLite & reg; X35 & trade; Hybrid & trade; They provide cushioning and responsiveness, and, along with FastFoam & trade; midsoles, maximize energy return for a much more efficient stride rate.
The Ultra Fastpacks are designed specifically for demanding routes: the design of the sole is improved to adapt to undulating and rocky terrain; the material Vibram & reg; Megagrip & trade; does just what its name suggests: it clings to any wet, dry, loose surface ... and the reinforced toe box and heel counter helps protect from impacts and bruises to the toes and ankle. .
Features:
FUTURELIGHT & trade; waterproof and breathable membrane.