Simple Water Boost Hydrating Gel Cream, $9.99 is, as the name suggests, simple. It's a lightweight gel made with hydrating minerals and plant extracts and since it doesn't contain much else (other than water), it's great for anyone with sensitive skin. It's also perfect for layering over potent anti-aging serums — it gives you moisture, but you don't have to worry about ingredients clashing.

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If most of the gels on our list seem too lightweight for you, opt for Koh Gen Do All in One Moisture Gel, $59, which is loaded with botanical oils. Jojoba seed, olive squalane and others are encapsulated and suspended within the hot spring water-based gel formula. As you rub it in, the tiny spheres of oil burst to give you tons of moisture. This gel can even be used as a skin-plumping mask before makeup. Simply apply a thick layer, relax for 15 minutes then tissue off any excess.

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