Winter-Proof Your Hair

Treat Tresses Gently

When your skin feels dry, you slather on moisturizer. Do the same for your hair. Look for treatments with protein, collagen, and amino acids, which "strengthen by forming a shield around your hair shaft," Wilson says. Also, after you rinse out your conditioner, apply a leave-in kind for an extra boost of hydration. If you'll be exercising outside, spray on a lightweight, dry oil mist and put your hair in a bun.