The bovine ChromeFree leather is smooth and light. Coming from farms located in the south of Brazil (Rio Grande do Sul), it undergoes an innovative tanning process where no chrome, heavy metals, or dangerous acids are involved. SPECS Upper: ChromeFree leather Panels: ChromeFree leather and suede Logo V: Suede Insole: Amazonian rubber (11%), biobased E.V.A.* (42% sugar cane), recycled E.V.A.* (11%), organic cotton (12%) and others (14%) Outsole: Amazonian rubber (40%), silica mineral (23%), recycled rubber (10%), synthetic rubber (11%) and others (16%) Welt: Synthetic rubber (40%), silica mineral (22%) and others (38%) Lining: Tech (100% recycled polyester) Laces: Organic cotton (100%)