When selecting the mask it is important to find a wide mask that covers your nose preventing you from inhaling any water when you are underwater. There are some masks that come with full face coverage which is great or beginners. It is important to check that there is suction around the mask with silicone which will keep the mask in place. If you have the option, be mindful to pick a mask that can hold the snorkel in place for you. The snorkel makes it easier for you to exhale when you are underwater. Some snorkels have valves in them, making it easier to surface and submerge while snorkelling. Fins are not essential when snorkelling but they definitely make it easier. It is best to start wearing fins if you are a beginner so you get used to them with time. The longer the fins the easier to swim around in the ocean.