Winner

Lierac Soin Éclat Express Moisturizing Mask, $25
This rich, creamy mask (shown) zaps dull, sallow skin with two hydrating ingredients: sweet-almond protein and hyaluronic acid. In combination, these substances give tired skin a boost, making it “look really fresh,” according to a tester.
To Buy: www.lierac.us for locations.

Runner-Up

Guerlain Super Aqua-Mask 6 Intensive Masks Optimum Hydration Revitalizer, $105
This sheet mask (you lay it over your face) contains a hydrating sap produced by blue cedar trees. It scored points for being mess-free.
To Buy: www.neimanmarcus.com.

Tip: For sensitive skin, do a patch test on the underside of your forearm before trying a mask. If there is no reaction after 24 hours, it should be safe to use, says Ranella Hirsch, a Boston dermatologist.