L'Oreal Professionnel Liss Unlimited Double Serum, $26, contains both a cream and a serum -- for hydration and shine, respectively -- that combine when you use it. It's packed with evening primrose oil and wheat proteins that help smooth the hair's cuticle as you heat style -- meaning each strand is healthier and naturally more humidity-resistant.

As the name suggests, Rusk Freezing Spray, $20, is the strongest of the bunch -- it will literally freeze your style in place. After you spray it, the polymers dry to create a scaffolding-like structure around your hair. While the hold is incredibly strong, the formula is also gentle enough for color-treated hair, and it washes out easily.

Unlike other hairsprays, Big Sexy Hair Weather Proof Spray, $18.95, has no holding power. Instead, it's designed solely to repel humidity. It also contains a UV filter to protect your hair (and hair color) from the sun, as well as keratin to strengthen individual strands.

Living Proof Perfect Hair Day Shampoo and Conditioner, $24 each, contain a patented anti-humidity molecule that was created by MIT scientists. It's called OFPMD, and it coats the hair like silicone -- but works so much better and never feels heavy. The TotalBeauty.com Award-winning shampoo and conditioner are infused with the ingredient, so you can load up your hair with frizz-fighting power even in the shower.