A NATO strap is a type of watch strap that is known for its durability, versatility, and military origins. Originally developed by the British Ministry of Defence in the 1970s, the NATO strap was designed to be a robust and secure option for military personnel. It is typically made from nylon, which provides strength and resistance to wear and tear, making it ideal for outdoor and rugged use.

The design of a NATO strap is distinctive, featuring a single piece of material that threads through the watch's spring bars, ensuring that the watch remains attached to the wrist even if one of the spring bars fails. This added security is one of the key reasons for its popularity among military and outdoor enthusiasts. The strap is also adjustable, allowing it to fit a wide range of wrist sizes comfortably.

NATO straps are available in various colors and patterns, often featuring stripes or solid colors, which allows for personalization and style variation. They are also easy to swap out, making them a popular choice for watch collectors who enjoy changing the look of their timepieces without the need for tools. Overall, the NATO strap is celebrated for its practicality, affordability, and timeless appeal in the world of horology.