Built on the popular Bikila platform, the Speed model offers the look and feel of your favorite vintage running shoe with the comfort of our most popular running product. Designed for the casual wearer, the Speed will accommodate a wide range of foot widths and instep heights thanks to the traditional lacing system. Vibram Five Fingers Speed Womens Features: Sole Thickness: 4.0mm 2mm EVA Insole Machine washable. Air dry away from heat source.