(Justin Boot Company) To build the world's most comfortable workboots, you need a system. Like the integrated seven-layer Double Comfort system built into these Justin original workboots. The heart of the system is the revolutionary new Body Cushion insole which provides maximum shock absorption and arch support. Working with the orthotic Texon/Poron insole, they truly create Double Comfort. Rugged, oil-resisting polyurethane sole.