A flotation device for diving, includes a u-shaped holster; a flotation piece, positioned inside the holster; and a connection harness, such that the connection harness can hold a tank with compressed breathing gas for diving, and a diver breathes underwater via a hose attached to the tank. The flotation device can further include adjustable straps, a carrying strap with a handle. The holster can further include an insertion aperture and at least one reinforcement strap. The flotation device can be a cylindrical elongated piece, including a pool noodle, and can be made from polyethylene foam. Also included is a flotation device for diving, including a u-shaped holster and a connection harness, such that a flotation piece can be positioned inside the holster.