A good New York City facial specialist is adept at combating acne, smoothing fine lines, boosting radiance, and hydrating parched spots. The best ones, though, know exactly why their products work the way they do and can tweak a facial until it’s perfect for the client’s specific skin type. The best spas in New York City, a skincare mecca, employ these top aestheticians. CompleteSkinMD, for instance, relies on a medical aesthetician who has been featured in Vogue and Harper’s Bazaar, whereas Caudalie Vinotherapie Spa employs experts known for pleasing tricky dermatologist clients. One of the best facials in NYC is performed by Christine Chin, who has tended to such celebrities as Penélope Cruz and supermodel Giselle Bundchen.