Our LDS makes it mandatory that you have mask, fins, snorkle, and weights before you can take the confined class. Whether you rent it, borrow it from another person or purchase it, is up to you, but you need to have them in your possession prior to attending class. But, that being said, I have to agree with everyone else, find a mask that fits and get it.. The snorkle is cheap, so I would suggest just going ahead and getting it also. You can borrow/rent fins if you know someone with them.