Bioderma Sensibio H2O Micelle Solution
Formerly known as Créaline ($31), the Bioderma cleansing water probably is the most famous French beauty product, and its fame is very well deserved. It was created to suit the needs of those who have sensitive, irritation-prone skin, and its alcohol-free formula soothes and cools as it cleanses. It is an easy yet effective way to take your makeup off (including waterproof mascara), and it maintains your skin's balance. I've tried a lot of different (read cheaper) cleansing waters that are also great, but I always come back to this one. And don't be put off by the price — a bottle almost lasted me a year!