Per size chart, I was between sizes.(M &L) I ordered one to ensure the M size was a good choice. I tried straight away, and by the next morning I ordered a three pack!! . They are so lightweight flattering and comfortable! . No hard elastic bands anywhere to dig in or show through!! Having gained some weight in my thighs dealing with a knee injury, these actually make me look and feel slimmer! I love the 95% wool content, no polyester!! I was concerned about roaming around or roll down. Not an issue. (They do follow along with my jeans or yoga pants when I pull them down in the bathroom) that I can deal with… Yes wool will stretch a bit by the end of the day, but they bounce back easily after gentle washing. I’m very happy with how they wash out in the sink (or delicate cool in machine) then lay flat or hang and they dry withins a few hours. The past two weeks I’ve worn these Boy Shorts almost exclusively. I do have other wool underwear, but I really prefer this Wooly style . I highly recommend these!