Evidently, panty lines are an issue for some. I don't wear my pants tight enough that it matters, and I'd prefer a panty line to a thong butt any day.  (could just get a full coverage butt tattoo and have the same effect).  These are what I'd looked for, and these are what I got :)  Very pleased. The fabric is thinner than some undies, but it's summer, I have a neurological heat intolerance, and these will be great.  They don't ride too low, and don't go to my armpits.  Very pleased. I also like this brand, so knew what I could expect before they arrived.