ProSpecs Power Walk 4 Walking Shoes (Men's) Plastic shank with MoveFrame technology is designed with upward bars that help stabilize your foot as you walk. Poron midsole cushions the heel, while promoting a smoother stride. Firm heel cup helps align your heel upon impact. Walking Impact Zone insole with EVA cushioning and Flubber 360 technology provides extra shock absorption in the heel. Outlast fabric lining helps regulate temperature for a comfortable, dry foot environment.