Women's ankle bootie with BZEES Air Step Technology: Designed so you’ll feel weightless, energized and free Ultra Lightweight: Step lightly with a nearly weightless feel Dynamic Stretch Fabrics: Move freely in shoes with built-in stretch FreeFoam Comfort: Low pressure insoles with maximum foot contact and cushy arch support Machine Washable: Wash on cold and air dry, 1 1/4 inch sole, and Odor Control technology