Choose the hot pack by size.

If you're putting it in your pocket, the regular type is fine; on days when it's out for a long time, the large hand warmer color hot pack (1,000 won) is more reliable. The Ramen Hand Warmer (5 pieces, 2,000 won), with its funny name, is great for sharing one with each friend. Carry-on restrictions for used hand warmers vary by airline, so check the airline’s guidelines before flying.