Model: N50 FITFLOP Crinkle patent PU uppers Leather/cotton twill lining with leather footbed All-day-cushioning and pressure-diffusing SupercomFF midsole technology Slip-resistant outsole with hard-wearing rubber pods FITFLOP Women's Derby Lace-up Patent Shoes. Accessorize in style (without sacrificing the comfort factor) with these classic derby lace-up shoes. Featuring crinkle patent PU uppers, leather/cotton twill lining with leather footbed, all-day-cushioning and pressure-diffusing SupercomFF™ midsole technology, and slip-resistant outsole with hard-wearing rubber pods, they will always keep your feet happy. FitFlop creates the world’s most ergonomic footwear for men, women, and kids. Founded in 2007, it is based in London, United Kingdom.