Hermes HERMES Birkenstock Mules in men's size plus 10. Spring and summer really need versatile slippers. They have a casual and high-end feel, and the comfort is great. The large toe design adds a playful feel, and the slip-on design is convenient and practical. Wear. Upper: Original high mercerized cowhide Lining: Water-dyed sheepskin Outsole: Original TPU water platform rubber film combination Code number: Women's size 35-40 (40-41-42 is non-returnable) Men's size: 38-45 (45 non-refundable),