How is it that we never feel the weight of these air molecules?

From the time we are born, our bodies adjust to the pressure of

air molecules on them. Our bodies are made up of bones,

muscles, fluids and a lot of air and exert as much pressure

outwards against the air molecules. This is why we do not feel

the weight of air on us. We only feel it when the air pressure

changes, like when we are on a flight or high up on a mountain.