As described previously, space/ether allows for the potential to move. Meaning, if there is no space to move … movement ceases. Air/vayu, on the otherhand, is the driving force behind all movement. Simply said, vayu or air is the principle of movement.
Vayu or air initiates & directs motion or movement. Air element keeps the body in constant motion.
The tanmatra of Air element is Sparsha (Touch). The sensory organ related to Air element is skin. Skin is very sensitive for detecting any movement, change in pressure or vibration in subtle form. Any movement against skin can be easily registered.
Air element is mobile, dry, light, cold and subtle in nature. Its main action is to do any kind of movement.