Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Should be renamed a barely luke warm cap

I am very disappointed with this cap. I bought it and now I am looking for another to replace it. Only to find out that others have had the same experience. I does not get warm at all. I can get the same amount of heat by just putting a plastic shopping bag on my head. I am very, very disapointed with this product. I am taking it back. I want my money back.