MBT Women's Yuki (Soft Sheep Leather, Level 3 Rock Black/black)Slip on these MBT Yuki flats for a night on the town. Yuki slip on shoes feature a soft nappa upper finished with a removable lycra lining footbed, our signature rocker sole and non marking rubber outsole. Features for these shoes include: Level of Rock: HIGH generates an i ncreased level of rock due to its strong sole curve and Pivot Axis for increased activation Upper: Soft Sheep Footbed: Removable Cow Lining MidSole: SensorTechnology OutSole: Non