O.T. (Organic Traced) leather comes from 100% organic certified farms in Uruguay, a country known for its culture of animal husbandry and the quality of the leather. It is the softest and finest of our leathers coming from bovines. This type of leather undergoes a mechanical beating process makes it fine and bendable. Tanned in Brazil using less dyes than our conventional bovine leather. VEJA uses conventional dyes that comply with regulations. Special attention is paid to water during the tanning process.Specifications:- Upper: O.T. Leather- Panels: Suede- Logo V: Amazonian rubber (26%), silica mineral (22%), synthetic rubber (14%) and others (38%) - Insole: Amazonian rubber (11%), bio-based E.V.A.* (42% sugar cane), recycled E.V.A. (11%), organic cotton (12%) and others (14%)- Outsole: Amazonian rubber (40%), silica (23%), recycled rubber (10%), synthetic rubber (11%) et others (16%)- Lining: Tech (100% recycled polyester)- Laces: Organic cotton (100%)