Rockport Women's Truwalk Zero Moreza Lace Up Fashion Sneaker 100% Synthetic Imported Rubber sole Comfort system designed to provide lightweight shock absorption. Lightweight polyurethane provides lightweight shock absorption to help reduce foot and leg fatigue Removable open cell polyurethane foam footbed provides full foot contact and support (6mm) Truwalk architecture allows for heel shock absorption, smooth heel to toe roll, easy forefoot flex