I am happy to see that the pull-up you are using sit so very well under your swimsuit.
And, to believe I was thinking wearing a swim diaper under a swimsuit.
I guess if you just want to catch some sun... but it would be pretty useless if you went in the water. A had to get in the water to free a boat prop once and I did not take off my molicare super. Holly hell I bet I gained 20lbs of water weight trying to get back in the boat. It was one fat diaper.