And that minute involved a fair bit of semi-desperate flailing and splashing about to stay upright and inhale air rather than water.

Two tubes lead from the bag to a mouthpiece: one with which to inhale air and the other to with which to exhale spent air.

Kirby can inhale air to make himself more buoyant, flying slowly by flapping his arms.

You feel as if you are inhaling air that has been there since the 1970s.

Studies show that, especially in the case of cloth masks, inhaled air often tends to flow around the sides.