Now that I understand how these things are built, fixed a pair of pajama pants I have been wearing forever, but I had gotten annoyed at, because they would fall off if not tied at the waist. (Old elastic!). Threaded some new elastic into a preexisting channel in the pants. Not perfect (the elastic is ever so slightly wider than the channel), but sure beats either having to remove a tangled knot anytime you would want to take off the pants (ie having to take a wee at 2am), or the shorts falling off. Trying to untangle a knot at 2am when you really have to pee, in tbe dark, when you are more asleep than awake... not a good time. #sewing #mending