CROCS - At Work, Ballet Flats. Black, Slip-on Non-marking, Slip Resistant W-9 Two vent holes at each instep. Rounded toe and 3/4” heel. Insole is textured a little and the sole is kind of cushioned. Nice traction on outsole. These flats should last for years 😊 Shoes have a bit of insignificant soil marks, but in great lightly preowned condition.