Gently used, about 15 miles on shoes Years of research went into perfecting the SuperComp Elite v4 containing a FuelCell midsole made with PEBA Energy Arc pairs sport-specific carbon fiber plate geometry with strategic midsole voids, designed to increase stored energy to deliver a higher amount of total energy returned Rocker profile for smooth, natural feeling transition from heel to toe Solid rubber outsole 188 grams (6.6 oz)