My Thin Hair Looks Twice as Full After Using This $8 Thickening Spray (2025)

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I’m always on a quest to find products that bring volume to my fine, straight hair, and the struggle gets particularly serious when I’m due for a salon visit. I usually need to turn to pricier products to bring my strands to life, but was ecstatic to recently come across a drugstore find that worked as well as anything I’ve tried: the Garnier Fructis Hair Filler Thickening Spray.

The thickening spray—which is on sale for $8 now—made my hair go from flat to va-va-voom in just one use. Celebs like Amal Clooney and Pamela Anderson are known devotees of Garnier Fructis products, and I’ve always been a fan of the brand, as well. While I’ve tried many of its classics, this was my first time using this particular spray, which is part of its latest hair-repair collection, designed to strengthen damaged strands from within.

Garnier Fructis Hair Filler Thickening Spray

The Garnier Fructis Hair Filler Thickening Spray is a leave-in formula made to give thin, weak hair instant volume and thickness—minus any stickiness. The spray is made with polypeptides, proteins that help protect and improve hair fiber strength, and citric acid, which helps reinforce the structure of chemically treated hair, according to studies.

I applied several pumps of the spray as directed, massaging the product from the roots to tips of my towel-dried hair. Although the spray has a light consistency, I was still afraid it would weigh down my strands or make my roots look oily. After blow drying it, though, I realized I had nothing to worry about. They say seeing is believing, and I honestly couldn’t get over how full my hair looked—as in nearly double the volume with zero weigh down. My hair also felt amazingly soft. The results lasted nearly two days and my roots never looked oily. All this for less than $10? Score!

No wonder Garnier Fructis Hair FillerThickening Spray is winning rave reviews from shoppers with fine, thin hair. One reviewer said they looked like they had twice as much hair and were “stunned” at the results. Someone else with thinning hair called it “an excellent thickening spray” that works as well as products three times the price.

If you’re ready to add some serious volume to your hair, grab Garnier Fructis Hair Filler Thickening Spray while it’s on sale for $8 at Amazon, and snag more volumizing products from the brand, below.

Garnier Fructis Hair Filler Fullness Repair Shampoo

Garnier Fructis Hair Filler Strength Repair Serum

Garnier Fructis Grow Strong Thickening 10-in-1 Spray