Our usual idea of an after-hours miracle worker would be a magical elf that cleaned our apartment and booked us a surprise trip to Tahiti as we caught up on shut-eye. But we have to say, this nightly rejuvenating treatment might be even better: While we sleep, it works to reduce and reverse signs of aging like wrinkles, dark spots, and rough texture. Soon we'll be looking so refreshed, we won't even need that vacation. (Not that we'd ever say no.)