Answer:
It is a common and favored clothing material among biker gangs and superheroes.
What breaks in the water but never on land?
Lots of them make up a word, And lots of words are in them. It's easy when you think about it. A while ago we stamped and mailed them.
Split me in half, and you get me and another me. What word am I?
The King of Pop's stellar dance move
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.