I ordered my size based on measurements and they were too big (so they slipped). I returned and got 1 size down, which is what I am reviewing.

I decided to try these out after seeing them in an ad on Facebook. As a teacher, I decided it would be perfect to test them out today when we were doing state testing so I was walking around a room for almost 2 hours straight. These things DID NOT BUDGE. At all. From 6:30a.m. until 5:00p.m. they did not slip, roll, or move. Even when sitting down/standing up after testing, still no movement.

The biggest thing is to make sure they are a snug fit, so I recommend going one size down if you have pretty thick thighs like I do. If it isn't snug, it will slip around.