Period swimwear?

Hi ladies, I’m just wondering if any of you have ever tried period swimwear from PantyProp or Modibodi. I got my iud inserted a month ago and am nervous I’ll still be bleeding when I go on my beach trip in March or that I’ll get my period randomly. I don’t use menstrual cups or tampons since I just find them uncomfortable, so I was just wondering if anyone’s tried period swimwear!

If so, how exactly does it work and DOES it actually work? Thank you!