To find the best volumizing hair products, I spoke to experts-hairstylist Whitney Eaddy and trichologist (a hair and scalp specialist) Kari Williams-tried and tested products on my limp hair, checked in with my fellow Cosmopolitan editors, and combed through reviews to determine what works best. Because while you can’t change your hair’s true nature (and shouldn’t have to!), there are ways to make it a little easier to style those IG-worthy blow-outs and defined curls. Yup, I’m talking about the strong-hold hairsprays, oil-absorbing dry shampoos, curly hair mousses, and thickening sprays that give your fine hair the assistance it needs to be ~voluminous~ instead of flat and limp. If you're anything like me and your dreams of full, thicker-looking hair are constantly thwarted by oily hair, fine hair, and product build-up, here’s your sign to try some new hair volume products.