At its core is our Pace Insole, podiatrist recommended, biomechanically engineered, and built to keep you moving with alignment and control. A ripstop upper keeps air flowing, while Vibram® traction grips the terrain you don’t see coming. No fluff. No filler. Just real support that goes the distance. Breathable polyester ripstop upper for lightweight durability and airflow Spacer mesh lining for ventilation and moisture control Built-in Tread Labs Pace orthotic insole (in medium arch height), APMA-certified for structured arch support and lasting comfort High-rebound EVA midsole for shock absorption Vibram® EcoStep Recycled EVO outsole for long-lasting traction Protective TPU toe and heel caps for durability and debris resistance Stack Height: 36mm heel / 28mm forefoot for cushioned protection and smooth transitions Weight single women's 9 = 332 g / 11.8 oz.