Intelligent design
It's a lightweight marvel, a well designed rashguard with sneaky labeling (it would have taken careful lighting to get the words and logo to show up so well) and important extras: the neatly sewn 2 cm rubber strip around the waist with a slightly more robust than usual boardshort connector. Plus the thin board-gripping pad material on the forearms. On the inside, it feels the same as the regular fabric, and the pad is flexible. Useful.