From Ryka, the Women's Revolution Rz2 Running Sneakers feature: Breathable air mesh upper Iridescent overlays Reflective toe and heel pieces Padded collar for comfort Lace-up front with flat laces Heel pull tab for easy on/off Partially recycled linings and internal components ASF™ (Absorb/Support/Flex) technology supports each phase of a runner's stance Anatomical insole for arch and heel support and partially recycled EVA Full length RE-ZORB® responsive cushioning for optimal impact protection and shock absorption + RE-ZORB® ITE midsole for lightweight responsive cushioning throughout Compression molded TPR rubber outsole with a textured pattern for enhanced grip and durability Approx. 1.88" heel height Weight: 320 g/11.3 oz per shoe  Heel-to-toe-drop: 14 mm Imported.