Thanks to these masks, styling your hair starts in your sleep.More
Don't Despair, Repair! Gel-to-Oil Overnight Repair Treatment by Briogeo, $28, sephora.com.
Best For: Extremely parched hair that needs a reset.
The Strategy: When your hair feels like straw, it's time to get serious about moisture. Massage a quarter-size amount of this gel into damp hair from roots to ends, wrap your hair in a silk scarf, and overnight, the gel-to-oil treatment will saturate it. Wash it out in the morning, and don't be surprised if you can't stop touching your ultra-soft strands.
Overnight Anti-Frizz Serum by StriVectin Hair, $35, nordstrom.com.
Best For: Frizz brought on by humidity or dry weather.
The Strategy: If your hair needs a more lightweight treat, then opt for a serum instead of a mask. This one doesn't require rinsing in the morning—just apply it to dry or damp hair before you go to bed, focusing on your ends. Over time, it will cut down on frizz and make your hair more manageable, no matter what the weather.