Shinsen means fresh in Japanese; and that's just what these are! This brand is a member of the Sustainable Apparel Coalition. Nylon and mesh upper. No-sew overlays. Textile lining. Textile insole. Phylon midsole. Lightweight EVA foam outsole with waffle treads. Measurements: Weight: 5 oz. Product measurements were taken using size 7, width B - Medium. Please note that measurements may vary by size. Color: gray