La Sportiva Men's Electron Trail Running Shoe 100% Leather and fabric Rubber sole A Slip lasted upper built on an ergonomic last provides a svelte, form fitting, glove like fit that is super responsive Microfiber upper protects the foot and conforms to any foot shape for a comfortable fit PU and EVA midsole work in tandem to absorb the trail features and provide the plushest ride on the market Soft PU deforms upon impact to dissipate impact forces before they are further absorbed in the EVA layer