FootSmart Stretchables Kathleen Flats Stretch synthetic leather upper accommodates swollen feet, hammertoes, pinched toes and overlapping toes. Stretch topline hugs your foot, enhancing the comfortable fit. Molded polyurethane insole features gel inserts in the heel and ball-of-foot for added cushioning and shock absorption where feet feel the most pressure. Thermoplastic rubber outsole absorbs shock, while remaining light and flexible on your feet. Soft, smooth synthetic sockliner and stretch fabric upper lining help reduce rubbing and irritation against your foot.