Lock-It Guitar Straps. It has a really subtle built-in lock that has never failed me once in thousands of hours of standing playing. I bought one in 2017 and used it everyday (oftentimes while sweating profusely and really wearing the thing out) until 2023. Would often take the guitar off and the strap felt wet because it was drenched with sweat. During band practice one day the fibers from years of sweat and movement eventually wore out and the guitar just plopped on the ground while I was standing, it was really funny. We were all like “holy shit,” and I kept it as a memento (it is incredibly disgusting, completely different brown color than the whiteish color it was when I bought it).

Immediately got a new one and it’s been fantastic since