Chase every finish line in running sneakers crafted to amplify the drive and joy behind every stride. BEST FOR: Running PERFORMANCE TESTED: Proven in lab testing for low impact (deceleration) for running + high propulsion (acceleration) for running RYKÄQ TECH: Built for a woman's quadricep muscle Q ANGLE with a narrower heel roomier toe + contoured cushioning for stability MATERIALS: Breathable air mesh upper with hung lining padded collar for comfort reflective toe and heel pieces iridescent overlays partially recycled linings and internal components CLOSURE: Lace-up front with flat laces and heel pull tab for easy on/off ASF™ (Absorb/Support/Flex) technology supports each phase of a runner's stance INSOLE: Anatomical insole for arch + heel support and partially recycled EVA MIDSOLE: Full length RE-ZORB® responsive cushioning for optimal impact protection and shock absorption + RE-ZORB® LITE midsole for lightweight responsive cushioning throughout OUTSOLE: Compression molded TPR rubber with a textured pattern for enhanced grip and durability WEIGHT: 320 g/11. 3 oz per shoe HEEL-TO-TOE DROP: 14 mm - Ryka Revolution Rz2 Running Sneakers Black Mesh Fabric 9. 0 M Lightweight