Merrell Cham Wrap Slam Shoe Adult Streamlining performance, this lightweight hiker with strectch collar allows easy access to the anatomic footbed and breathable mesh lining that means whatever the adventure your feet stay cool and comfortable Upper: Synthetics with breathable mesh and a protective rubber wrap Lining: Breathable Mesh Midsole: Molded EVA with air cushion Outsole: Vibram Rubber Lug Depth: 4mm