Step into effortless style and comfort with Skechers Slip-Ins: Ultra Flex 3.0 - Smooth Step. Featuring a Stretch Fit engineered knit and jersey trim upper with a Skechers Slip-Ins heel panel and a cushioned Skechers Air-Cooled Memory Foam insole. It is complete with a flexible traction outsole, along with a front pull tab for easy on and off. Heel Pillow Technology.