Snorkel #63016-AA snorkel is a curved breathing tube that allows swimmers or snorkelers to breathe air from above the surface while their face is submerged in water. Its commonly used for recreational activities like snorkeling, where users can observe underwater life without lifting their head. The snorkel is usually made of lightweight plastic or silicone and features a mouthpiece at one end and an open or dry top design at the other to prevent water entry.