From Aetrex, the Women's Darcy Stretch Knit Arch Support Washable Slip On Sneakers feature: Stretchy knit upper Slip on Front and back pull tabs Microfiber footbed lining treated with antimicrobial technology to help fight every day odors Lightweight UltraSKY™ midsole for comfort Arch Support designed to help support natural alignment, our unique arch support position, height and contour aligns in the proper place to help support our bodies from the ground up and helps to relieve plantar fasciitis and common heel/arch pain Removable insole EVA and rubber outsole Machine washable Approx. 0.8" heel height Imported.