A:  Well, jeans don't have a lot of give, and if they are snug or fit you well, then it's acting as a support to your joints as you move through a squat set. They really function as a powerlifting suit does, in terms of cradling your knees, hips and butt and preventing you from going down to far, jutting too far forward, or being unstable on the way down. In fact though, they do make denim powerlifting gear. It's a solid fabric and it provides a stability most of us need in the squat. One word of caution though, their construction wasn't designed to bear that kind of weight forever. It is a dangerous thing to be in the middle of a heavy lift and then have a seam blow out! The injuries you could sustain are immeasurable. So, we suggest if you like the concept of denim, you should invest in some made-for-powerlifting gear. It's designed NOT to blow out during a heavy lift. You'll be much safer and still get the benefits of denim. And we think you're going to like it better and that it will improve your lifts even further.