The Aetrex E190 Essence Dolly Black Stretch Comfort Clog is made with a stretchable spandex upper for maximum comfort and breathability. This attractive shoe features an open backed, slip-on style. The E190 also features 1/4" removable depth in two layers - a patented Aetrex Performance Insole and Aetrex's innovative Mozaic Customization Technology for customization and fitting flexibility.