These are probably my favorite pants! I purchased them for running and they work perfectly for me. I wanted something that covered my thighs and knees because even though I'm in pretty decent shape, I had to face the fact that I'm now in my 40's and.....well.....the skin on my thighs doesn't "fit" on me the same way it used to! These pants are not tight, but do fit well. I'm 5'7 and 125 pounds and the small fits great.