These are so great. They're a nice thick material, and they're SQUAT PROOF. Trust me ladies, I have a large caboose and I put these things to the test. They are a little shiny when you squat, but it's totally the elastic in the pants and not your knickers underneath. The material is breathable and stretchy but not too much. AAAAAAND, they don't slide down as you're running or stretching. Seriously, if I could justify buying 10 pairs of these, I wouldn't wear any other pants.