Please click for the La Sportiva Size Conversion. Turn your adventurous side on with the Electron from La Sportiva®! ; Four-way stretch nylon and microfiber upper perforated panels for added breathability. Dynamic last is an ergonomic last for a form fitting glove-like fit. PU and EVA midsole work together to provide the plushest ride on the trail. Soft PU deforms upon impact to dissipate impact forces before they are further absorbed. Mesh lining. Morphdynamic FriXion® AT outsole for grip on various terrain. Weight: 13.34 oz ; Product measurements were taken using size 44.5. Please note that measurements may vary by size.