Ahh, one of my favorite places to be - lying by a pool or the beach in Cozumel! Great spot to pick up a nice tan, but unfortunately, that sun exposure (there or anywhere) will also pick up nasty free radicals and cause premature aging, wrinkles, sun spots and skin cancers if you're not protected from UV radiation. My favorite sunscreen is EltaMD UV Clear SPF 46 at least on my face, neck, decolletage and hands. I vary what brand of SPF 30-50 I use on the rest of me. Oh, and avoid sun exposure between 10 and 2:00 as that's the most intense sunlight. Lather up!