You should be able to buy duty free cosmetics at Korea's airport. Check with your country's Customs official how much you are able to bring back.http://www.taxfreetravel.com/South-Korea-Duty-Free-Allowances Sometimes it's cheaper to buy cosmetics in an ordinary department store and you can always say they are for your own use[ just don't buy 20 jars of face cream!] L'Oreal cosmetics/face creams are good for women over 30.

Correction: Next week, l will go to Korea for a one week business meeting. The skin care product is so famous that a lot of colleagues have asked me to get something for them. After l learned about the shopping procedure in Korea, l found one problem. In Korea, everything will be sold with tax and duty but there are many free duty shops there also. My question is: should l buy in a specialty store or a free duty shop? Some people said if you buy in speciality store, you can also get a refund of duty in the airport, how to get refund of duty? l am not self-confident enough with my English to deal with this. l also want to know that which kind of cream is better for one woman who is already thirty years old. l am appreciated with any suggestion from other people.