I bought this strap as a replacement for the leather strap on my large Field Satchel. Nothing went wrong with the leather, but fixed straps always twist, and I don’t like fiddling to untwist every time I pick up my bag. The swivel clasps on this strap allow me to grab the bag in any position without having to untwist for a more comfortable carry. This is a huge improvement for me. And in case you’re wondering what to do with the leather shoulder pad, I used it to fortify and give structure to the interior bottom of my Field Satchel! Win-win!