You might think, since scuba diving has cylinders and regulator, why the breathing tube is one of the standard equipment? Because first of all, when you in the water surface to rest or swim, your face in the water look down or looking for things, you can through the diving snorkel breathing in order to reduce the consumption of air in the cylinder. Second, when the water has waves, you can take advantage of the diving snorkel nozzle height is usually higher than the height of the wave and avoid letting water poured into his mouth. Thirdly, if you are away from ships or the shore the place water leak out, while the air in the cylinder is depleted, diving snorkel can make you more easily swim back to the ship or the shore, you face can naturally put into water. While in snorkeling, breathing tube is the necessary equipment, you don't need to look up in the water, but can stay in the water for a whole day. General diving snorkel design is open at one end, and the other end is for a around mouthpiece of tube bending, most of the diving snorkel is made by silica gel and plastic material mixes, diving snorkel top circular tube is usually made of a semi-rigid plastic, while the lower portion of around mouthpiece is made of silica gel material. A suitable diving snorkel should have proper curvature (suit yourself face shape), the inner diameter is 2 centimeters; length is 30 to 35 centimeters. Suitable breathing tube besides comfortable, it still need breathe easy. When trying, can will around mouthpiece between the lips and teeth, will play on the left ear before, around mouthpiece should appropriate comfortable, not scratch mouth or cause chin fatigue, and in your mouth is flat straight. Like mask, flippers and other diving equipment, divers can choose different color of the diving snorkel. Divers can buy snorkel mask, fins, and the other equipment with color to match each other diving snorkel. General diving snorkel body and the plastic joint part all have color, but the around mouthpiece and other with silica gel for material part keep translucent color. All of the diving snorkel with which can be fixed in the mask belt fixed button, this kind of fixed button is a kind of simple rubber or silica gel material fixed ring, its shape like a central long figure 8 retaining ring or with fixed clamp ring clasp, when every divers in every dives should check the diving snorkel fixed buckle whether firmly.