2. Avon Advanced Techniques Frizz Control Lotus Shield
How it works: If you've ever seen a lotus plant sitting on the surface of a pond, you would have noticed it never gets soggy. Inspired by the leaf's H2O-repelling ability, Avon formulated this lightweight frizz-fighting treatment that you can do right at home. The best part is that it's for all hair types — from the finer strands to the thickest locks. Just apply a dime- to a quarter-size dollop in your hair and brush it through, then style as normal.
How long it lasts: Up to three washes
Where to get it: $12, avon.com