"My son decided to be spooky this year instead of heroic. He saw this costume and instantly wanted it. He was not disappointed when it arrived. Halloween weather is highly unpredictable. This costume will be great over a T-Shirt or a sweater. One thing to note: this does run small. My son is an average size 7 1/2 year old and the costume just fits. I can't imagine it would fit him at 9 or 10."