I have a rash guard! I feel so fashion forward now.
It's hot pink, long sleeved zippie model, very similar to the neon green one on the blog, but neon pink. DH surprised me with it a few years ago as a gift, after I told him that my goal was to Never Get a Sunburn Ever Again -- especially in cleavage area, which is showing my age more than anywhere else on my poor aging body.
I wear mine over a tankini or bathing suit. Summer weather/water in NE can be quite cold, so it serves well -DRY- to keep me warm on cooler days, or as a cover-up at the end of a beach day. When it is WET, it does not dry all that fast, so I find it keeps me cool & comfortable on super hot & humid days too -- especially because I run hot.
Not sure how I ever lived without it.