Photo: John Lawton

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I is For...Instant Bounce
When your do needs a pick-me-up, dry shampoo is your solution. A lightweight, spongy formula—try —gets rid of excess oil and imparts volume without leaving hair matte. Put a dollop in your palm, massage it into roots, and go.

Drybar Detox Whipped Dry Shampoo Foam ($24;