I bought these to wear  under suit pants to avoid panty lines.  most of the longer undies are "shapewear" that doesn't breathe and feels like i'm wearing a plastic bag. I wore these yesterday, checked for pantylines doing every kind of stretch, and saw none.  They were much more comfy than shapewear, kind of like wearing cotton, but moisture-wicking.  the crotch is a little odd-shaped, a rather large piece of fabric, but the seam didn't seem to show and that was my main concern.
the only downside to these is that they did tend to ride up a little, and when I took my slacks off I did see wrinkles in the underwear.  but I didn't see them when i was wearing pants and that was the main concern.
the pants i was wearing were suit pants and lined, not stretch.  I think these would show under stretch because they rode up a little.
I just purchased 3 more pairs I was so pleased.
these are the only wicking-breathable longer undies that I have found.
these tend to run a little large.  according to the measurements I would have been a "large" but I ordered a medium and that fit well.  I wear a 6 / medium in most other underwear.