Outer material: 100 percent cowskin. Inner material: 50 percent polyester 50 percent polyuraehane, 95 percent polyester 5 percent polyuraehane. Closure type: laces. Heel: flat. Lace-up Derby shoes by BOSS, crafted in smooth leather with embossed branding and a removable padded insole for premium comfort. Laces. Fully lined. Packaging: Box. 50498467