Step into effortless style and comfort with Skechers Hands Free Slip-ins®: Ultra Flex 3.0 - Smooth Step. Designed with our exclusive Heel Pillow™. This style features a Stretch Fit® engineered knit upper, plus a cushioned Skechers Air-Cooled Memory Foam® insole.®: Ultra Flex 3.0 - Smooth Step. Designed with our exclusive Heel Pillow™. This style features a Stretch Fit® engineered knit upper, plus a cushioned Skechers Air-Cooled Memory Foam® insole.