You had us at "you can sleep in it."

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Credit: Ren

Applying a rinse-off face mask in the evening is relaxing and all, but by the time my bedtime rolls around, keeping my eyes open for the twenty minutes it takes to do its thing is practically impossible. Instead, I've become a connoisseur of leave-on, overnight treatments—so trust me when I say REN Wake Wonderful Night-Time Facial is one of the best.

The formula is a one-two punch for dull skin: Thanks to a blend of exfoliating lactic and glycolic acids along with plumping sodium lactate, it gently resurfaces and hydrates at once. As for the end result, I hesitate to use a term as nebulous as "glowy," but just one application of this stuff will leave you looking just that. It's not a cure-all if you suffer from issues like acne, but for me, it's the closest I'll get to a facial while wearing pajamas.

REN Wake Wonderful Night-Time Facial, $60;