The PUMA ForeverRun NITRO dawns a new era of support and guidance for the frequent runner who deals with overpronation. With the softness of a full NITROFOAM midsole without compromising stability, ForeverRun offers heavy propulsion for a softer landing. It features a newly developed NITROFOAM midsole with two different densities – a softer core with a firmer rim – and an asymmetrical heel counter to hold the foot in place through every stride. With the PUMA ForeverRun NITRO shoes, the theme also continues on the outsole, with a supportive outsole that's built to handle pronation. In short, ForeverRun NITRO is the perfect blend of support and cushion.