Merrell Siren Edge 3 WP J034446W brand Birkenstock • Merrell Air Cushion in filter Winter Grip • Merrell Air Cushion in the heel absorbs shock and adds stability Accordion fold out FEATURES • Waterproof membrane seals out water and lets moisture escape • 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 breathable rugged mesh & TPU waterproof upper for increased durability while on the hiking trail