With the all-new Impulse, lightweight and stability go hand in hand. It’s Altra’s lightest stability shoe to date and combines Innerflex and StabiliPod technologies to give you flexible stability where you need it. Built-in drainage holes provide quick moisture release and superior airflow. The friction-free, lightweight upper and FootShape toe box keep your feet comfortable across long distance runs. The fully cushioned Zero Drop platform encourages a more natural, low-impact foot strike and features a lightweight, responsive A-Bound/EVA blend. Go fast, stay stable and run better with the new Impulse.