- Celine Celine's new spring and summer Baotou half-slippers. This season Celine has made me fall in love with them again. It is a super popular slipper. One of the recent highlights. The simple design is paired with the classic logo as an embellishment. The overall vision is particularly eye-catching. It goes well together! Upper: polished cowhide, lining: sheepskin, sole: original multi-layer combination outsole, size: 35-39 (customized sizes 34, 40, 41, 42 are non-refundable),