The Altra Experience Flow is a high-performance all-rounder for long runs, daily workouts, and race day. It features Altra’s FootShape fit for natural toe splay and a rocker shape geometry for seamless, stable strides with a speedy roll. Engineered Mesh Upper, Lace Up Closure, EVA Midsole, Rubber Outsole, FootShape Fit, Rocker Shape, Heel-To-Toe Drop: 4mm.