Answer:
What can be seen but not touched?
Retired people want these to be large and birds want them to hatch.
A small hill with seven holes.
I look at you, you look at me, I raise my right, you raise your left
It is a common and favored clothing material among biker gangs and superheroes.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?