@Alice Ahhh, this seriously looks like something I would wear to the beach because I sunburn the very second I step outside. I am the nerd in the long sleeve sun shirt *in* the pool. 😖
I am kind of digging the stripes and the big pocket. If it folds up into that pocket? I'd be sold.
I think the style and color of bath robe (or wrap) should be taken into consideration. Red velvet? You're inviting gossip and side-eye. Leopard print? Do you also have cat-eye sunglasses and an updo? Pokémon print? A little bit paedo, even if you remain an avid player in your 40s on up .
Also you need to consider how easy something is to put on over a wet swimsuit. Pullover things aren't always the easiest for that, unless they are ridiculously voluminous, which this does appear to be!
As far as the beach goes, does the fabric retain sand? Terry cloth would to an irritating degree.
(Full disclosure: this is coming from someone who has spent many blissful hours at clothing-optional hot springs in the dead of winter, where you absolutely need fluffy and warm items that are easy to don right outside the pool, otherwise you're gonna freeze your everything right off.)