The Nin Ari high boots are made of leather with strings to be fastened only the first time you wear them, because then you can easily slip them on and off by opening the side zips. Upper: 100% Leather - Lining: 100% Leather - Insole: Comfort 100% leather - Outsole: Rubber - Heel: 5 cm - Upper: height 23 cm circumference 29 cm in size 37 - Material designer: Soft