Responsive - Light and springy cushioning that propels you forward; Max support - Assisted transition from landing to toe-off and added cushion underfoot; A high-stack combination of DNA GOLD and DNA FLASH v2 helps protect you from impact; Brooks' nylon SpeedVault plate helps propel you to hit your times; Quick, easy, assisted transitions - The curved geometry of the RapidRoll Rocker actively assists heel-to-toe transitions; Breathable, secure upper - Lightweight upper provides breathability and comfort; Having structure to help secure the foot at high speeds; 45mm total stack height; Midsole drop: 6mm; Weight: 8.8oz / 249.5g