Good Riddles

Question: What kind of coat can only be put on when wet?

Question: What is it that after you take away the whole, some still remains?

Question: I fly, yet I have no wings. I cry, yet I have no eyes. Darkness follows me; lower light I never see.

What am I?

Question: Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not.

What is it?

Question: At night they come without being fetched, and by day they are lost without being stolen.

What are they?