Victorinox Swiss Army I.N.O.X. Leather 241737. Imagine a material so robust it can withstand fire, water, salt spray, acidic substances, and countless twists and pulls. A material prized by watchmakers for over a century, and redesigned by Victorinox Swiss Army. The tough leather originally used in the crafting of firemens boots is a material that measures up to the ultimate I.N.O.X. standards of resistance. A hypoallergenic strap that retains the natural grain and suppleness of the leather while incorporating the strength and durability of a highperformance material.