From Aetrex, the Danika Knit Lace Up Sneakers feature: Knit fabric upper Lace up closure Fabric lining Removable lightweight Ultra Sky EVA insole Added cushion under the ball of foot  Heel cradle to offset heel pressure Super soft terry lining on insole Lightweight EVA outsole with rubber heel and toe inserts Approx. 1.13" heel height Machine washable instructions: remove insole/wash on gentle cycle with cold water/air dry only Imported.