——GUCCI Gucci Double G Hollow Color Block Flat Slippers Gucci Interlocking Double G Hollow Slippers The interlocking Double G is renovated with enlarged hollow details on these leather/suede slippers. Upper: imported lambskin Inner lining: cowhide lining. Heel height: 5. Sole: Italian genuine leather. Number of outsole: 35-39 (34, 40, 41 customization is not returnable),