I was looking around for a strap that ‚does-it-all‘ and at the same time for a different purpose.
So I bought 2: one for a different manufacturers backpack (fits, problem solved) and the other as a ‚shoulder-retention-strap‘, to keep a sling around my shoulder from slipping and dangling, pretty much like most courier bags have.
Long story short: while it was not made for that, it ticks almost all boxes and makes this strap the most versatile and useful I can think of. Furthermore, it not only holds to many different forms due to their design, it has a safety loop as well, so it doesn‘t get lost. Great design, really. Could have a bit more slack for my use-case (get‘s a bit tight with too much clothing), but then again, it was not made for this - and still serves the purpose (on normally dressed days).