- Celine Celine's new spring and summer lazy slippers. This season Celine has made me fall in love with them again. It is a super popular slipper with its own heightening effect. One of the recent highlights is the simple design with classic logo as a The overall visual embellishment is particularly eye-catching and easy to match! Upper: cowhide with double metal buckle decoration. Lining: sheepskin. Sole: original multi-layer combination outsole. Size: 35-39 (34, 40, 41, 42 are custom-made and cannot be returned or exchanged).