description:The bovine leather comes from farms in Uruguay, a country known for its culture of animal husbandry and the quality of its leather. It is tanned in brazil, respecting the REACH norms. Special attention is paid to water usage during the tanning process. fabric:Upper: LeatherPanels: SuedeInsole: Amazonian Rubber (11%), E.V.A. Bio-Sourced (45%, including 36% Sugar Cane), Recycled E.V.A. (13%), Organic Cotton (5%) and Others (26%)Outsole: Amazonian Rubber (40%), Mineral Silica (23%), Recycled Rubber (10%), Synthetic Rubber (11%) and Others (16%)Lining: Recycled Polyester (100%)Laces: Organic Cotton (100%)Made in Brazil Using a washing machine is strongly discouraged to prevent altering the properties of the materials. Waterproof your shoes using a product appropriate for the material. Repeat every 3 to 6 months. Maintain the smooth leather of your shoes with a damp cloth and a specific spray product. Finish by applying a protective balm. Repeat every 3 months, or as needed based on the condition of your shoes. Let dry in open air, away from heat sources (such as sunlight or radiators), to prevent any discolouration. measurements:If you are between sizes, we recommend you choose a size above your usual one. Size 36: 22cmSize 37: 23cmSize 38: 24cmSize 39: 25cmSize 40: 25.5cmSize 41: 26.5cm