Strap Stoppers
Low in-store inventory, may be subject to change.
The simplest, easiest strap lock. Nothing to install.
These stretchy rubber discs keep any strap from slipping off. They're like the cap gaskets found on Grolsch™ beer bottles, but ideally sized for strap buttons.
Put your strap on, then add a Stopper over each button. Your strap stays put!