Originally developed in Germany in the 1950s, perlon can be identified by its unique cross-weave pattern and single pass construction. An alternative to the more common NATO strap, a perlon strap offers a more lightweight and breathable construction. Where NATOs can sit thick and high on the wrist (hence James's famous solution), a perlon strap has a gossamer, feather-like quality that makes for easy wearability on humid summer days.
I'm a bit biased toward perlon straps. In full transparency, they're my personal summer go-to and are one of my favorite ways to add a touch of texture or color to a watch. Don't get me wrong, I enjoy good NATO strap (and own plenty of them), I just like the qualities of perlon a bit more on my wrist.
The Activity: More water-adjacent activities? How predictable. But seriously, in my personal experience, perlon straps are better for casual swimming and hanging out at the beach. Compared to a NATO, a quality perlon strap will dry quicker, will be more breathable on the wrist, and is even easier to rinse (sandy NATO = rash waiting to happen).
Hot Tip: The cross-weave pattern allows for infinite micro-adjustment. Perlon straps are the only strap option I'm aware of that will allow you to find the perfect fit, every time.
