If by "simple" you can include hours spent googling and YouTubing, then this was simple. I have always wanted to make a new infinity dress. My original wasn't in the best material and then I cut it up for a dress muslin, which became a nightgown because it wasn't the best material. In my early searching, I can across a company selling many types of infinity dresses, including "Ivy".
I liked many of the styles shown and recognized that really, this was just a rectangle with "armholes" and a long tie for the neck.
I chose this crazy patterned fabric, feels like a polyester knit. I went and got a similar feeling black to make the tie. Of course, on the cruise, there was no way for me to remember all the different ways to tie it.
I'll probably wear it again, I just need to build some confidence my ability to do the different ties. And we either need a real summer, or another trip south LOL. Also, if you're trying to pack light, it's easier to get away with re-using one dress when it's a more basic solid colour LOL. This was a very distinctive dress on a ship of about 2500 people!