I totally agree with Robert, the Nikon AN-4B strap is a bit of a hidden gem in my opinion. I use it with my M5 and it is perfect. Actually, I use it on all my other M's and my Nikons! For me it is pretty much the perfect strap. Nikon used to supply it free with certain models, it's tough, discreet and most importantly doesn't get in the way. For me it would be hard to beat and I've used them for years.