The Puma FOREVERUN NITRO dawns a new era of support and guidance. Targeting specific foot strikes stages through a combination of the RUNGUIDE SYSTEM features, this innovative model takes support to a new level. This shoe performs for all runners but is specifically designed for those looking for the softness of a full NITRO midsole without compromising stability.These features include a newly developed NITRO midsole that has two different densities - an industry first. Softer on the inside with a firmer rim, the FOREVERUN NITRO rides super smoothly with new geometry. An engineered mesh upper combines with an asymmetrical heel counter to hold the foot in place, in a well-fitting shoe. The outsole design optimizes overall pronation control, including a wider medial rubber segment stabilizes late-stage pronation. The FOREVERUN NITRO is the newest guidance solution in Puma's performance running line, built for durability and comfort.