Single pass are great. I’m not a fan of traditional natos for the added bulk.Is a single pass NATO one that doesn’t have the loop back where you tuck the end back in? That’s the primary reason I don’t like NATOs. Maybe I should try that out.
A single pass eliminates the extra fabric flap underneath the case, so there is only a single fabric layer instead of two. It also still retains the key feature of saving the watch if you blow a spring bar still.
They are becoming more common to buy as is, but it’s also quite simple to trim a standard nato into a single pass. You can also easily trim the length to eliminate a long tail. For tucking the end in I usually tuck it under itself which is tidier.
Hope that helps.