Snorkeling equipment does not simply mean a mask, fins, and a snorkel. It’s extremely important that you purchase a mask and fins that fit you well and a snorkel with the proper bore size.
First, a snorkelling mask provides the air space our eyes need in order to focus and see the beauty of the underwater world clearly. Most mask skirts are now made with silicone, but some manufacturers have tried to cut costs and use a polyvinyl or PVC material. One drawback of this is that PVC has a tendency to become less flexible in cooler waters, which affects the mask’s ability to fit to the face. It is important that a mask fit the face perfectly so that no water seeps in. If you wear glasses, there are companies that can chemically bond prescription lenses to the inside of the lenses of any mask. Also, it’s a good idea to purchase a replacement strap for your mask. If you have long hair, straps made of neoprene are great because they reduce the chance of entanglement. A purge valve is another good feature to have. This is used to clear water from the mask, should any seep in.
When it comes to fins, there are full foot fins, which are like a slip-on shoe, and strap fins that keep your foot in with a strap behind the heel. Fin blades come in different lengths, widths, and strengths. Stiffer blades will give more propulsion and distance with each kick, but require stronger muscles and stamina. If you run or exercise on a regular basic, then those could be fitting for you.
Regarding snorkels, there is a difference between ones for adults and ones for children; the size of the barrel differs. Silicone snorkels are more resistant to the elements than black rubber ones. You can also get snorkels that have purge valves, to remove water from a filled snorkel.