The Spire Gtx from La Sportiva is an innovative new generation mountain boot, ideal for fast hikes and demanding outdooradventures. This versatile hiking boot combines the traditional DNA of La Sportiva with the latest technologies from the field of mountain running. Thanks to the revolutionary GORE-TEX SURROUND technology, the Spire Gtx is not only waterproof, but also offers exceptional breathability. This exclusive technology enables 360-degree-ventilation by increasing the ventilation surface of the upper, insole and midsole in EVA and laterally perforated TPU. The ventilation channels along the midsole are protected by a robust mono-bava nylon mesh that prevents the ingress of small stones and debris. The mid-cut upper of the shoe is equipped with the Nano-Cells 2.0 structure, which consists of super breathable small cells and, in combination with GORE-TEX SURROUND technology, ensures maximum breathability. The lower part of the shoe is equipped with the Stability Control System , which provides anti-torsion stabilization and integrates the ventilation channels of the GORE-TEX SURROUND technology. The shoe profile with the Vibram XS Trek compound guarantees optimum grip on a wide variety of surfaces, whether hard, soft or muddy. The Spire Gtx thus offers round-the-clock comfort and breathability to master even the most demanding hikes. Product details Optimal for: Hiking Speed hiking Running Materials: External material: Abrasion-resistant and breathable mesh with Nano Cell 2.0 structure, toe and heel in PU TechLite Chuck: GORE-TEX SORROUND Inside/Midsole: Compressed and cushioning EVA with TPU sides and GORE-TEX SURROUND air channels. Outsole: Vibram XS Trek con Impact Break System