Damselfish
Contributor
People that are used to a warm climate on average want more insulation than people from colder places. And some people just run colder than others. There isn't one right answer. I suggest full coverage of some sort, or people snorkeling for a long time will get burned to a crisp. A shorty will likely result in burned backs of arms and calves. Even so called "waterproof" sunblock isn't going to do the job. I always wear a skin.snailman:Thanks, everyone, for your input. I scouted the field sites for the class last year wearing a 3mm full suit - and was as happy as a clam. I began wondering about the necessity of wetsuits after talking to a couple of very experienced course leaders (other schools, same destination) whose students never wear any protection.... the age old conflict between your own common sense and advice from someone else!