What’s The Difference Between A NATO And ZULU Strap?
They key difference between the two straps is how they’re worn on the wrist. Traditional military style NATO’s have an additional strap, which slides through the two lugs, so you have two straps of nylon under the watch. However, you can also get one-piece “BOND NATO” style bands.
ZULU straps only have one long strap, which makes it chunkier around the buckles and the strap is made of thicker nylon, see below on this IWC watch. A ZULU strap can also have 3 buckle rings or 5.