A watch strap is much more than a simple accessory, especially when it's fitted to a dive watch or a military watch. It determines both wrist comfort, safety in real-world use, and the timepiece's visual identity. Steel, rubber, textile, or NATO strap—each material meets specific requirements related to water, shocks, and extreme conditions. The choice of strap also influences the watch's durability and its everyday versatility. Long considered secondary, it is now recognized as a strategic component of any tool watch. Understanding its specific characteristics is essential for adapting your watch to its intended use.