Works well on the beach to keep warm and dry!
This was a purchase for youngest 7 y/o to try sea swimming in what passes for summer in the UK. We were East Coast and whilst this offered good sun protection youngest was complaining of cold after about 15 minutes and didn't really warm up enough to remain in the sea.
By contrast eldest 9 y/o used a Decathlon wet-suit style jacket and was warm enough to remain in the water as long as wanted.
In summary, a good suit for warmer sea swimming or outdoor pools but not enough for UK summer sea fun.