The Sportiva Spire GTX are fast, day hiking shoes that have made breathability their strong point. They feature a low-cut upper made with a Nano-Cells 2.0 structure, composed of super-breathable cells that work in synergy with the Gore-Tex Surrond membrane for unprecedented increased breathability. This fantastic membrane gives total waterproofness to the footwear but also keeps the foot inside dry from moisture: it allows total breathability thanks to the increased ventilation surface area that includes the upper, insole and the midsole in EVA and TPU perforated on the sides. The ventilation channels are visible along the profile of the midsole and protected by a very resistant mono-bava nylon mesh to prevent the entry of pebbles and impurities. We also find the Stability control System technology, which is an anti-torsional stabilisation system. Finally, the compound is a Vibram XS Trek, perfect for hard, soft and muddy terrain. La Sportiva Spire GTX trekking shoes