If it's digging into your legs, you either have a very short torso (not particularly likely), or you're wearing the belt way too low (much more likely). Make sure the belt is nice and broken in. It takes a couple of days and 1-3 training sessions. You'll get a feel for how to use it properly pretty quickly. I had some crazy deep purple bruising the first time I used mine, much smaller bruising the second time, and none since.