Derma EDerma E Hydrating Serum

BUY at Birchbox

To a geologist or an architect, water is a major source of lines (think: rivers carving their way into the landscape, rain leaving rusty streaks on building fronts). But when it comes to skincare, water can make lines disappear: Boosting hydration fills out skin, reducing the appearance of wrinkles. This ultrahydrating formula absorbs deep into skin to help it hold onto water from within, for a smoother, younger-looking complexion.