In the quest to live life without chafing thighs, I purchased Jockey's Slip Shorts. They are light and breathable and not at all restrictive like Spanx and other girdle-type shorts are. I loved how they fit, they were very comfortable.
Unfortunately, the "slip" turned out to be a verb and not a noun. Those shorts would not stay in place. Wearing them under my uniform dress, I had to hike them up roughly every six steps. And that's too much adjusting of underwear in public. I tested to see just how far they would slip down by walking to the store without hiking them up. I hadn't gone a block when they had crawled down to my knees and I resorted to holding them up at knee level to keep them from ending up around my ankles.
There was no clear sense of sizing either. In the dressing room I tried on LG, XL, XXL, XXXL in different colors and lengths and all seemed to fit exactly the same. I went with the smallest size I tried on. Maybe I should have gone smaller? Or maybe this product needs to go back to the drawing board.