Rockport - Circuit (Midnight Blue/Spa Blue) - Women's: Stylish walking shoe for the next generation. DMX FlowPak midsole dynamic air-cushioning system. Strobel construction provides forefoot flexibility which aids the walking motion. EVA footbed is contoured for personalized cushioning. EVA midsole provides lightweight cushioning to reduce leg and foot fatigue. Rubber outsole for durable traction. Fiberlon shank provides lightweight midfoot support. Suede upper and mesh for breathability. Airport friendly.