• Altra Slim Footshape™ fit is the slimmest-fitting option that still allows room for your toes to spread out naturally
• Natural Fit has roomy toe boxes and zero drop, built to keep you comfortable and keep you running
• Grid-like Innerflex™ grooves in the midsoles are designed to provide flexibility and movement
• Original Altra EGO™ foam is designed to harmonize the balance between responsiveness and comfort
• Footpod™ outsole technology encourages natural movement underfoot