Without a fly opening, and with the . . . peculiar . . . proportions, these feel wrong, and not in a good way. They give all the discomfort of borrowing your wife's underwear without the bother of having to explain to her why the elastic broke.
Look, the fabric is fine, as I was ready for bamboo-polyester. Being a 38" waist, I was at the top of "Large" and the bottom of "Extra Large." I decided to go with "Large." The boxer briefs are smaller in the leg than one might expect -- being much more of a brief than a boxer -- and they run small.