Under Armour Micro G® Optimum running shoes have a low profile, lightweight design for near ground contact and stability. The full-length Micro G? foam sole transforms cushioned landings into explosive takeoffs and a moulded 4D foam footbed matches the shape of your foot to prevent slipping. The high abrasion EVA outsole ensures constant contact for an incredibly smooth ride and transition. - A.D. Integrated midfoot structure with heel lockdown, built for support that doesn?t add weight Moulded 4D Foam..