Korea Climate Companion Card - 2 Cards Price is for a set of 2 cards. Allows unlimited travel on public transportation (bus and subway) within Seoul. Often sold out in Korea, so it's recommended to purchase them before you go. Separate charging is required. You can purchase a free pass for a certain number of days depending on the amount charged. You can charge the card using the station machines, which have a Japanese language option. I actually used this card myself and found it very convenient, as I didn't have to worry about the remaining balance and recharge constantly. Highly recommended for those who don't prefer taxis! 1-day pass: 5,000 won 2-day pass: 8,000 won 3-day pass: 10,000 won 5-day pass: 15,000 won 7-day pass: 20,000 won