Synthetic-and-meshRubber soleSHOE SIZE: D = Medium width, EE = Wide width, B = Narrow width, EEEE = Extra wide widthFOOT SUPPORT: Ideal for runners with all arches looking for support. Our new Guiderail Support System focuses beyond the feet to the most injury-prone part of a runner??s body: the knees. GuideRails keep you moving comfortably by keeping excess movement in check.CUSHIONED FEEL: Soft and protective, these shoes provide just the right amount of cushion in each step to let you float through your run, walk and everyday life.BALANCED, SOFT CUSHIONING: BioMoGo DNA and DNA LOFT cushioning work together to provide a just-right softness underfoot without losing responsiveness and durability??yet it feels lighter than ever.MODERNIZED FIT: Engineered mesh and the 3D Fit Print upper provide the structure and proven fit of this Go-To Shoe with a streamlined look.