Think you need to slather on the thickest cream you can find to fight parched skin? Not according to Annet King, director of training and development at Dermalogica and the International Dermal Institute. "Traditionally people swap out to a heavy cream for night, and this isn’t necessary today," says King. "The main difference between night and day products is SPF is found in day moisturizers. Products do not have to be thick to be effective. Quite the opposite: serums, fluids and liquid boosters under a lighter cream are more easily absorbed." Try Dermalogica's Intensive Moisture Balance ($38) – then amp up the effects with Skin Hydrating Booster ($53).