Rubber sole Designed specifically for women, this hiker is built with a stabilizing, comfortable foam midsole and a Merrell exclusive Vibram TC5+ outsole for confidence no matter the terrain. The Siren Edge comes in lightweight, breathable rugged mesh & TPU upper for FEATURES Breathable mesh and TPU upper Traditional lace closure Bellows tongue keeps out debris Breathable mesh lining Kinetic Fit BASE removable contoured footbed for flexible support Merrell Air Cushion in the heel absorbs shock and adds stability Molded nylon arch shank Lightweight EVA foam midsole with zones of softer foam may reduce pronation Vibram TC5+ outsole provides exceptional traction for outdoor multi-sport activities, formulated exclusively for Merrell Drop: 11mm Vegan-Friendly Half pair weight: 0lbs-9.87oz, 280g