Answer:
I am a small paradise surrounded by dryness and heat. What am I?
What is harder to catch the faster you run?
I am a kind of coat that can only be put on when wet. What am I?
When you buy me I am costly, but the only use I have is hanging only. What am I?
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word. What am I?
No matter how little or how much you use me, you change me every month.