The Altra Men's One 2. 5 Running Shoe has the versatility to go from casual training sessions to full marathons. Fully Cushioned Zero Drop helps you maintain a proper form while the Natural Ride System works with the Foot shaped toe box to ensure a natural stride. Air mesh makes the upper breathable for warmer weather, and the Contour footbed provides a touch of cush for comfort. The A Bound midsole returns energy to your step, and InnerFlex ensures a worn in feeling right out of the box. The FootPod sole utilizes rubber pads in high wear areas to provide traction on a variety of terrain.