ForeverRUN NITRO kicks off a new era of support and guidance for runners with the new mid-range soft NITRO full-length midsole without sacrificing stability. The new NITRO outsole with two thicknesses (soft core and hard shell) and a shapeless heel counter keeps the foot in place. The head continues in the middle thanks to the large rubber zone in the medial area that defines the articulated ends. In short, they are the perfect combination of support and cushioning.