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 without using any hazardous or prohibited chemicals. VEJA uses conventional dyes that comply with regulations. Specifications:- Upper: Leather- Panels: Leather - Logo V: Amazonian rubber (26%)- Insole: Amazonian rubber (11%), sugar cane (42%), E.V.A (53 %), recycled E.V.A (11%), organic cotton (12%) and others (14%)- Sole: Amazonian rubber (40%), silica (23%), recycled rubber (10%), synthetic rubber (11%) and others (16%)- Lining: Tech (100% recycled polyester)- Laces: Organic cotton (100%)- Backloop: Recycled polyester (100%)