Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The best eye mask for airplane flights ever!

For years I relied on free eye masks handed out by airlines, then I bought various fancy ones from spas and health food stores. None of them worked as well as this Bucky. I resisted the price ($25) at first, but now find that it is worth every penny. Buy the Bucky that has a tiny pocket for earplugs - it comes with earplugs that are strung together so you won't lose them. As a frequent flyer who takes red eye flights, this is utterly indispensable.