The elastic, I believe, has velcro on the side that isn't facing the camera, and pull the shins together and attaches to the white velcro on the leg armor to clamp it together.
I had some blood elves... couldn't stand the male attack animations after a while.
I'm sitting on an 80 UD Warlock, 72 UD Mage... a bunch of alts...
I still don't know what class I want as a main! LOL.