The Silverton 6-inch Boot from Caterpillar features Super Welt Construction combines a reinforced textile for flexiblilty and a Texon board for torsional stability. T742 Outsole - enhanced rubber compound combining durability extended wear and flexibility. Removable polyurethane sockliner with compression pads. A boot that will take you where you want to go in comfort and rugged style. Slip Resistant Sole and Breathable moisture wicking sockliner.