Was unsure between buying this or a proper snorkelling top but bought this as cheaper and fitted a little more easily as snorkelling tops are very tight fitting! It really helped me avoid sunburn on my upper torso/arms and was really good to snorkel in. Was quite a tight fit when wet so would recommend trying in store first. If you easily burn then consider something else like a snorkelling wetsuit with long arm sleeves (and possible leggings) as arms are still out for the sun to get.
Good , good price