I was skeptical about the claim that it stays in place, no riding up.  I bought one to try out.  First wearing.....comfortable!
BUT will it stay 'NO RIDING UP' after being thru the washer and dryer?.....................YES !
I chose the briefs........not high cut, well, because I am old.  I liked these so well, that I bought 6 more pair several months ago.  Yesterday I bought 4 more pair to completely phase out my old panties. I had 6 or 7 various brands/types that I tried out and was always yanking them out of my behind.  It is so distracting.  I like these because they are silky and there is no friction when I wear jeans that fit me well. Don't worry tho, there is a cotton panel in the crotch.
I am now concerned that these will age out of the Vanity Fair line up and I'm considering buying a few more pair for the future. Love the Vanity Fair Smooth Moves Briefs Panties #13091