Hello everyone,
Newcomers have expressed their anxieties and confusion about scuba diving equipment. Today, I want to take this opportunity to do a bit explanation. Hope you find it helpful. The preliminary stage of diving is quite simple. Remember three must-haves.

1. Mask
Mask helps divers see clearly in the ocean. Because the angle of light refraction in the water differs from that in the air, the mask helps the eyes focus—after all, we are not fish, nor are we mermaid. Mask can be differentiated into “single-lens mask” and “dual-lens mask”. The lens for the single-lens mask is not replaceable, but it offers a broader field of view. Lenses for dual-lens mask however are replaceable. (Single-lens mask photo source: https://tusa.com/us-en/TUSA/Masks). 

Special “full-face mask” has two types, one for snorkeling and the other for scuba diving. The full-face mask for snorkeling has the combined function of snorkel and mask. Divers can breathe through their noses. (Photo Source: https://snorkeling.oceanreefgroup.com/product/aria-uno/).
A full-face mask for scuba diving can also be used for underwater projects. They usually are equipped with telecommunication functions and can be used to communicate in the water and offshore. Masks are made of PVC, rubber, and silicon; silicon masks are of better quality as they do not carry a plastic smell and are more durable and comfortable. (Photo Source:   https://www.kirbymorgan.com/products/bandmasks/bandmask-18).
It is recommended to choose a mask that fits one’s face contour to avoid water penetration. When one tries on a mask, inhale and hold the breath to test how long the mask will stay close to the face. The longer it holds, the better. A good mask will not fall off until one exhales. Choose a mask that fits Asian face is also important!!! It helps balance ear pressure and increases comfort. The masks for Europeans and Americans have larger nose sizes and do little to balance ear pressure. 
Notes: OceanMAX’s masks are designed to fit Asian face contour. They have silicone skirts and waterproof seals, designed to provide comfort. After use, wash the mask with water and keep it in a cool and ventilated place to avoid mold and damage.

2. Snorkel
Snorkel is mainly for free diving and snorkeling. It allows divers to breathe in the water and prevents them from drinking too much seawater that will damage kidneys. Although snorkel is not a must-have, it helps in an emergency when cylinders do not contain sufficient air and when one floats in the sea. Using a snorkel when one is getting ready in the water also saves more air in the cylinder that can be used later during diving. Generally speaking, a snorkel can be differentiated into three types, “wet”, “semi-dry” and “dry”. The wet type is basic and a straight tube design without valves. It is used for free diving. 

In contrast, a dry snorkel has the most complete structure. Drainage is at the lower end. The float valve at the air inlet automatically seals the snorkel tube when completely submerged to prevent seawater from entering. The semi-dry snorkel does not have a float valve. Instead, it has a splash guard top to prevent seawater from entering. Other functions are similar to dry snorkel. Both silicone and PVC are used, but the former has a better quality. 

Compared with fins and masks, it is easier to choose a snorkel. Selection can be done according to one’s budget and needs. If you are renting from a dive shop, it is recommended to purchase your own mouthpiece for sanitary reason. 
3 Fins
Fins help produce strong propulsion force during diving. It also protects the feet. There are two types of fins, “full foot” and “open heel”. With Full-foot fins, one does not need to wear a dive boot. Wearing dive socks is optional. Open-heel fins need to be worn with a dive boot. 
For example, OceanMAX’s Free diving Fins FF1 (long blade fins) is a type of full-foot fins. The foot pocket is made of high-quality rubber, and its hardness is ergonomically adjusted for comfort. Elongated blade fins are made of a high-grade polypropylene with medium hardness and excellent elasticity. The fins have a 17-degree angle bend to generate more effective propulsion power. It is the top choice for coaches and divers around the world. Do not hesitate to try it on!

Fins can be roughly differentiated into “rubber materials” and “composite materials.” Rubber fins are heavier and inconvenient to carry, but with sturdy and durable materials, they offer excellent propulsion force and better elasticity. Composite fins come with a variety of designs and are lighter and easy to carry.
OceanMAX’s FLOW FINS are made of composite materials. It earned the award of BEST BUY in 2019 based on the evaluation of professional diving magazines in 2019. The FLOW FINS series combine the advantages of PP plastic and TPR rubber to generate strong thrust. The surface of the fin has a 15-degree bend. The design is for an ergonomic fit and reduces stress on the legs. The anti-slip sole ensures a strong grip when walking on coastal reefs and decks. Do not hesitate to try it on!

Finally, in addition to design and appearance, it is important to choose a suitable size for feet comfort. Find your three must-haves in OceanMAX!