Known for its lightweight properties, EVA is a special polymer that provides excellent cushioning. The Black Sands outsole features Vibram's Megagrip technology which provides superior grip and traction on wet and dry surfaces. Designed specifically for sandals, the 827 last cups the foot to lock it in place and provide a secure fit for whatever terrain you encounter. Whether seeking adventure on the trail or roaming around the campsite, this last offers superior stability and comfort.