Steve Madden Rocky Leather Boots. The ROCKY knee boot features the wide profile of an engineer boot with harness and buckle hardware adding an industrial edge and giving the design an adjustable fit. Block heel engineer boot. Slip-on style. Top gore with 4 adjustable buckle straps. 2-inch heel height. Leather upper material. Textile lining. Synthetic sock and sole. This product is made with premium leather and is individually hand finished. As a result, the product can vary slightly from the pictures. Fit tip: If you are in between sizes, size up a half-size. Imported.