9 US GORE-TEX® membrane for weather-proof performance. Breathable mesh lining for keeping your feet cool on hot hikes. Recycled mesh footbed cover and EVA foam footbed for an environmentally-responsible fit. NXT lined footbed cover for an odorless stride. Rock plate for extra protection from bumps, bangs, and bruises. Merrell Air Cushion shock absorption and stability for a comfortable and responsive ride. Forefoot and heel cushioning pods for a low-impact landing. Super Rebound Compound for some extra spring in your step. Vibram® TC5+ outsole for uncompromising grip on the grittiest terrains.