The aptly named La Sportiva Electron is lightweight, agile and highly reactive. Thanks to the Heisenberg Principle you will never know its speed and position simultaneously, but you will run confidently knowing that this nearly mass-less shoe is built with the stability of a noble gas. A microfiber upper helps create a glove-like fit and the new Morpho Dynamic sole will keep your feet highly cushioned and extremely energetic. Morpho Dynamic sole Adaptable Terrain Interface Extremely responsive Low profile Microfiber upper