The Altra Rivera 4 is a lightweight daily trainer built for neutral runners seeking natural movement and responsive comfort. Featuring Altras signature FootShape toe box and Balanced Cushioning, it encourages low-impact form with a zero-drop platform. The updated midsole delivers a smoother ride, while the breathable engineered mesh upper offers a secure, foot-hugging fit. The Rivera 4 is versatile, sleek, and road-ready.