Brooks Women's Ghost 9 GTX fabric and Synthetic Watch the miles disappear behind you with each stride you take in the Brooks&reg; Ghost 9 GTX running shoe! Successor: Ghost 8. Support Type: Neutral to underpronation (supination). Cushioning: High energizing cushioning. Surface: Road. Differential: 12 mm. GORE-TEX&reg; membrane ensures breathable, waterproof protection in wet conditions. Engineered mesh upper provides breathability and needed stretch. Lightweight synthetic overlays. Plush tongue and collar. Soft fabric lining for a great in-shoe feel. Removable foam insole. BioMoGo DNA is a blend of earth-friendly BioMoGo and responsive Brooks DNA, and has a gender-friendly cushioning design, making for a dynamic ride. Full-length Segmented Crash Pad acc