I am everywhere you go but you do not see me.
I am nearby when you speak, you may hear me.
I lengthen in size, whether I be big or small.
I could be a goblin or a troll but you would not know.
I can be faster than a cheetah but probably not as fast as light.
I am cool and refreshing, especially on a summer’s night.
I like to go with the flow, but there is no real meaning in that.
A touch from me could be gentle, or you may not feel it at all.
If I told you more about myself, would you know what I am?