Abstract: A protective insole, designed with a chain-linked layer or similarly virtually impenetrable layer, which is preferably placed within a shoe as an additional sole, meant to augment the original sole of a shoe, thereby preventing nails or other sharp objects from penetrating the entirety of the shoe and causing harm to the individual. The central portion of the insole is designed to be flexible, providing for the easy installation and removal of the insole within the shoe. The chain-links are preferably rubberized to provide comfort to the user, and are sized to fit the shoe they are designed to fit within.

Abstract: A protective insole comprised of chain mail which is placed in between the lower and upper soles of a construction boot, thereby preventing nails or other sharp objects found on construction sites from penetrating the shoe and causing painful injury to the worker. The insole is preferably rubberized as to provide comfort to the user, and is melded in between the lower and upper soles of the boot. In an alternative embodiment of the invention the chain mail insole is fabricated as a separate, removable sole that is rubberized and placed in the boot itself.