Normal foundations tend to exaggerate dry, flaky winter skin and latch on to dry patches. Enter hydrating foundations. The ideal hydrating foundation makes skin look dewy, doesn't accentuate dryness, and lasts all day long. Producer Celia Skvaril tested out four top-rated hydrating foundation formulas to try to find the best one. After wearing each hydrating foundation for a full eight-hour day, she ranked them all and picked her winner based on performance and wear.