If you travel a lot and your skin suffers because of it, try this classic Shiseido Eudermine Revitalizing Essence ($62). It responds to your own moisture level (which can shift in different climates) and is touted as one of the brand's oldest and treasured products. This liquid is made to soften and help improve your skin year-round no matter where you are in the world. Definitely add this to your suitcase, STAT.