Integrated midfoot structure with heel lockdown, built for support that doesn’t add weight. Molded 4D Foam® footbed conforms to your foot's exact shape, eliminating slippage. Full-length Micro G® foam turns cushioned landings into explosive takeoffs. High abrasion EVA on the outsole keeps constant contact for a smooth ride & transition. Light, high-abrasion foam on outsole covers zones that get less tread for full ground contact.