Our Go-To-Shoe is turning 20 and isn't slowing down. New, integrated GuideRails® support is smoother than ever while just-right cushioning softens every step. SUPPORT Support MIDSOLE DROP 12mm WEIGHT 9.4oz / 266.5g ARCH Medium, High EXPERIENCE TYPE Cushion TECHNOLOGY GuideRails, DNA LOFT, BioMoGo DNA USE Road Running