Zoot Women's Coronado Running Shoe 100% Nylon Mesh Imported Rubber sole 12 millimeter drop Bare fit internal liner with and open mesh upper provides comfort and an exceptional fit. No sew construction provides added support for the foot Z bound under the foot provides a soft responsive feel. Z bound insole for added internal comfort and durability. Carbon span gives the mid foot support and a dynamic toe off. Dual density medial support for overall foot support ZCR in the heel and high abrasion area of forefoot for durability. ZBR in the forefoot for added cushioning and durability