Very comfortable. I've been missing out all these years. I've worn these with loose fitting shorts a couple of times and this probably sounds stupid but the first time I wore silk boxes, in Jason's Deli I got from my seat up to go back to the salad bar and I was all looking down to make sure I was wearing clothes! I kid you not, it was like one of those terrible nightmares when you were in middle school and realized you were in only your underwear. But worse. So, these are very comfortable. Maybe like Seinfeld's famous "I think silk is a little TOO comfortable".