If you were in S.A. I could help you, I go diving alot so I know where most of the shops are, but If your just going to go snorkelling you might just get some stuff from academy and that would work fine. However, what I found has worked well is (depending on where you go) to simply get the stuff there. If its like a resort town e.x. key west, etc. or something they will usuallly have a better selection than any place here would. Sometimes, they will even have better prices because they have more competetion. Where are you going snorkelling anyways?