An old favorite is up to something new.

Not every beauty product can stand the test of time. Heck, sometimes our foundation barely makes it past noon. But for 160 years, Kiehl's has been doing what it does best: delivering high quality skin and hair products.

And this month marks a first for the centenarian. Kiehl's will debut its first-ever, full-service spa, on the Upper East Side. We talked to the team for a sneak peek at what's in store:

• It's all about you. Each signature facial includes a personalized skin diagnosis and infusion therapy (it helps the ingredients penetrate), a hand-blended masque, plus a warm argan oil hand treatment.
• It's no-nonsense. Every treatment incorporates Kiehl's famous natural-ingredient formulas, and the body polish is made with Kiehl's signature ingredients, squalane and beta-carotene, to nourish and improve skin's texture. Can't wait for the spa? Try this DIY facial from our friends in Chicago.

Now that's eternal youth.

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