No one wants to be caught with their pants down. While that is certainly embarrassing, your fly being down is also an ordeal you don’t want to face. Maybe your zipper is just faulty, or you have a hard time remembering after you walk out of the bathroom. Either way, you don’t want to be grabbing at your zipper whenever you think it might be down.

This instructional for the Discreet Pants Fly Checker will guide you in building a paging system that will check to see if you’re zipped, or in need of an adjustment. You’ll need items like conductive thread, a vibrating pager motor, and pants with a watch pocket, but everything seems pretty easy to find. The video below shows how it works, but all you need do is press a button, and it will ‘page’ you about the status of your leg holsters. Of course, you could just put a split key ring on your zipper and loop it over the button so it can’t open at will.

https://www.youtube.com/watch?v=2BBkkoqbYBk