- Celine's new mid-calf motorcycle boots. The low-key and simple design is embellished with the brand's LOGO, making it highly recognizable. The top of the foot is slim and light. The thick-soled 4.5cm design is not distracting and can easily elongate the leg proportions, no matter what combination it is. Everything can be easily controlled! Upper: cowhide, lining: cowhide, sole: original open-molded TPU outsole, sole thickness: about 4.5cm, size: 35-39 (40 customized, non-refundable),