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.