Cayu is the best of Aerosoles and the finest in design! Cayu is modern, modern, modern. Aerosoles brings comfort technologies such as a flexible unit bottom, diamond flex outsole, perfect pitch heel, and Aerofly insole inside, so this ankle bootie is comfortable all day and all night long. Asymmetrical, Cayu is an ankle bootie on one side, a shootie on the other. Extremely soft upper and highly flexible, Cayu features a luxe zipper for easy on and off. Casual, while futuristic, Cayu is great with skinny jeans, or to-the-ankle pants. Simple, easy, comfortable, and chic! Zip closure Flexible insole China Imported Product Specifications 1.6" heel height 3.7" shaft height 10.5" shaft circumference M Material TPR- Thermo Plastic Rubber Faux Leather