A basic snorkel consists of a curved tube with a mouthpiece. This is called a "J" snorkel, and an example is pictured to the left. Another common design is a flex snorkel. These snorkels allow the mouthpiece to hang away from the face while not in use.

The mouthpiece must fit comfortably in your mouth without causing jaw fatigue. You hold it in your mouth by biting on two tabs located at each side of the mouthpiece.