Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good for oversee travelers

I used it when I visit an oversee country during winter. The area has no heating system and tempuratures there were between below-zero to 30 degrees. This handwarmer is easier to use and very helpful. I just put in my pockets to help myself stay warm. And I also shared it with my families and they all love it. So, I left all the leftovers there when I came back.