Good Riddles

Question: What is bought by the yard by is worn by the foot?

Question: what is in the middle of the sky?

Question: Cold and dark, I'm the same as my neighbor. Flatter than a pancake, faster than a panther. Lighter than a feather I still prevail, Yet a million mean trying to lift me would fail. Expanding and shrinking throughout the day, When heat is highest, underneath I lay. I leave in the darkness of the night, And don't come back if there's rain in sight. What am I?

Question: what comes in hard comes out soft and you blow ???????????????????????????????????????/

Question: I come in varieties of color and am found almost year round. My house is tall and my only fear is the cold. What am I?