Travel must-have: Cashmere sweater
"I can be a bit more glamourous at night, but during the day when I'm working in the office I love chic and casual," says Prisca Courtin-Clarins. A.P.C. Wool and Cashmere Blend Sweater ($250), at net-a-porter.com.
Travel must-have: Clarins cream
"On the plane, I clean my face and put on a lot of moisturizer." Clarins HydraQuench Cream ($49.50), at clarins.com.
Travel must-have: Clarins serum
“I always use Clarins HydraQuench Intensive Serum and Cream. And lots of SPF.” Clarins HydraQuench Intensive Serum Bi-Phase ($59), at clarins.com.