Some things — peanut butter and jelly, Mary Kate and Ashley Olsen, Mulder and Scully (what?) — just work better in twos. The same can be said of beauty products. Granted, using multiple products at once is hardly a new trick, but certain treatments, when combined, really pack a punch. Be it the way their ingredients invisibly interact to better shield your skin against sun damage or, on a more superficial level, the lewk they achieve when applied in direct succession, the skin care and cosmetics world is full of game-changing duos that should be as ingrained in your neurons as the aforementioned condiments/fashion designers/FBI agents.
Get acquainted in the slideshow above.