The Altra Rivera running shoe is slim, sleek and snug. The new open-road-ready shoe is features FootShape™, Altra EGO™ midsole and a Neutral Innerflex™ outsole for flexibility and performance. The womens shoe is made of light and breathable engineered mesh upper. It includes the Balanced Cushioning™ to encourage better alignment and a low impact landing. It also includes FOOTPOD™ technology to encourage natural movement underfoot.