La Mer The Lifting Firming Mask

This is a treatment rather than a weekly habit: Miracle Broth, the ferment at the center of everything La Mer makes, in a format built to be left on and then taken off. What a firming mask is for is the short term — the smoothing and tightening that makes a visible difference for an evening — sitting on top of whatever you already do the rest of the time. It is the least routine product in the line and the most occasion-driven.