Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Keeps ears warm - but ear muffs come in more colors.

Comfortable headphones for keeping ears warm, not much else. Purchased for product features, including charger. Charger did not work after 2 days. Headphones stopped working after 8 hours gentle use--transmitter kept sending signals though. Very disappointed in product - would not recommend - loose wires, poor reliability.