Article of footwear having a knitted upper

An article of footwear comprising:

• an upper with an outer surface that defines a forefoot region, a midfoot region, and a heel region;
• a heel element secured to the upper proximate to a heel region;
• a sole structure;
• a medial side;
• and
• a lateral side,
• wherein the upper includes a membrane layer and a material layer, the material layer including a knit fabric and defining a first knit zone and a second knit zone,
• wherein the first knit zone is located in a first region and the second knit zone is located in a second region,
• wherein the first region and the second region include a webbing that forms a warp knit within the material layer, and the warp knit includes a plurality of peaks and troughs, and
• wherein a binding line extends across the plurality of peaks and troughs.