- Balenciaga 23 spring and summer new high-heeled slippers. I love this simple yet complicated design style! The actual product is very stunning, the best-looking style all year long, full of street style without losing the feeling of a big-name brand. Upper: embossed cowhide Lining: imported sheepskin Sole: Italian leather outsole Heel height: 6.5cm Size: 35-39 (40 is custom-made and cannot be returned or exchanged),