On Running Key features Weight: 250g Nylon-blend Speedboard® for momentum & powerful take-offs Biggest-ever CloudTec® = an extra cushioned running shoe Max cushioning, max energy return Reworked dual-density Helion™ superfoam adds bounce Improved sustainability Speedboard® made from nylon blend and shaped for propulsion Mesh on the upper made from 100% recycled polyester Foam insert in the forefoot to absorb impact Womens black running sneakers size 6.5 Worn maybe once or twice