Nike Dunk Low LIGHTWEIGHT SUPPORT. RESPONSIVE CUSHIONING.The Nike Flex Experience 4 Women's Running Shoe features a single-layer mesh upper with leather overlays for breathability and support. The cushioned foam midsole doubles as the outsole for comfort and durability, and flex grooves help create a natural, flexible feel.BenefitsHexagonal flex grooves let your foot move more naturallySingle-layer mesh and no-sew overlays keep the shoe supportive and light7.2mm heel-to-toe drop enables a more natural motion Injected unitsole midsole doubles as the outsole for cushioning and durabilityWaffle outsole pistons absorb impact and spring back for added responsiveness