Veja - Rio Branco Brittany Gravel Size 7 Excellent Pre-Loved Condition. The Alveomesh is a technical fabric made out exclusively of recycled polyester. It brings breathability, flexibility and lightness to the shoe. The suede is made from the underside of bovine leather previously brushed to make it softer and more flexible. Product details: Upper: Alveomesh (100% recycled polyester) Panels: Suede and Leather Insole: Amazonian rubber (10%), bio-based E.V.A. (38%, including 31% sugarcane), recycled E.V.A. (11%), organic cotton (18%) and others (23%) Midsole: E.V.A. bio-sourced (66%, including 53% sugar cane) and others (34%) Outsole: Amazonian rubber (12%), mineral silica (30%), synthetic rubber (49%) and others (9%) Lining: Recycled polyester (100%) Laces: Organic cotton (100%) Made in Brazil Please Note: Website states you should size up from your normal size.