u/pcp777_

I love the Planet Wave D'Addario locking straps. They are inexpensive and comfortable and have a locking mechanism at the strap end, so it's a strap lock that requires no modifications. This way, I also don't have to dedicate a strap to a guitar. The end has a slider with a jaw that locks. The slightly more expensive one just clips over the strap button. They are like $15 to $25 and 100% effective. It's nylon, so machine washable too. Never dropped a guitar yet. I use 2 or 3 of them for all my guitars.