Sleek nylon swim briefs from AussieBum. One in navy, the other in black. Both worn just a few times for ocean swimming. These are high cut, so they actually have a looser fit than the regular 2.5” classic or your standard swim briefs. These ride high on the hip, similar to Speedo Solar. But the back side has regular full coverage. No spandex, so the fit is a bit looser overall but still comfortable.