Instruct: Classify Amazon reviews into positive or negative sentiment
Query: False advertisement

Bought this bag have been using it homeless for about a month and a half. It is comfortable with thermal underwear around 50 degrees F. At about 30 degrees F I was shivering in this bag with thermal underwear and TWO sleeping bag liners that were supposed to add 14 degrees EACH to the bag. Needless to say the temperature ratings on these things are absolutely ridiculous. I would probably not use this bag alone in weather under 40 degrees. Complete trash.