Wait, I remembered one more thing! I wear my knee/leg warmers pretty much all the time (yes, under my work pants because I have PFS and keeping my knees warm helps a LOT) and when I first started doing this I noticed that they would slip down no matter how far I pull them up. I kept pulling and pulling until they were as far as they would go but it still wouldn't work...I was frustrated to say the least.

Finally, I realized that they were getting PULLED down not falling down. I pulled up the bottoms so it was just barely loose around my knee so that when my knee bends, it no longer pulls the top of the warmer down. Problem solved!