Hilary Duff’s $29 Secret for Beachy Waves Found on Amazon

Hilary Duff’s hair always warrants its own headline. We’re referring to that effortlessly windswept, beachy look, a slightly tousled texture that appears as if she just emerged from the Pacific Ocean and landed on a magazine set. No rigid curls. No exaggerated waves. Just free-flowing movement, body, and that coveted lived-in softness that makes you wonder, “How?”

Thankfully, we have all the details on how Duff achieved that “fresh out of the ocean” look for the May cover of Sports Illustrated Swim. According to celebrity stylist Barb Thompson, the entire style was centered around one Aussie brand: BondiBoost. This brand served as the styling partner for Duff’s cover, and Thompson specifically used one product to achieve that stunning, bouncy hair.

Grab the BONDIBOOST Thickening Hair Spray for $29 (originally $33) at Amazon! Note: prices are accurate as of the publication date and may change.

“For Hilary’s Sports Illustrated Swim cover, we aimed for hair that felt effortless, sun-kissed, and powerfully natural, as if she had just stepped out of the ocean with that perfect wind-swept texture,” Thompson explained. “The look is all about movement, softness, and that healthy dimension.”

Here’s what caught our attention: Thompson didn’t opt for a curling iron or a heavy mousse. Instead, she misted BondiBoost’s Thickening Therapy Volumizing Styling Spray at Duff’s roots and lightly through the crown, then lifted with her hands rather than using a brush. No tugging, teasing, or endless scrunching involved.

If you’ve been battling to maintain volume that doesn’t fall flat by lunchtime, this behind-the-scenes detail is worth saving. Hair tends to lose density and bounce over time, and the products that claim to provide lift usually lead to one of two disappointments: weight that drags it down or a sticky finish that makes your hair feel like a helmet. Thompson’s technique avoids both issues, and the spray itself is designed to keep things light.

The effectiveness of this product lies in its formula. Epsom salt gives the strands a touchable, slightly textured body that you’ll want to run your fingers through. Hyaluronic acid plumps each strand from the inside out, revealing fullness that appears genuine instead of artificially inflating. Biotin and vegan collagen do the heavy lifting, ensuring that hair looks consistently fuller over time rather than just in the moment. The base includes aloe, and the formula is free from silicones, sulfates, and parabens, which is important if you’re trying to simplify your beauty routine without sacrificing results.

“To add fullness without stiffness, I misted the Thickening Therapy Spray at the roots and lightly through the crown, lifting with my hands instead of a brush to keep it airy and natural,” Thompson clarified. “The end result is healthy, strong, and naturally sexy, movement-driven hair that feels authentic for Hilary.”

If you’ve been admiring the cover and wondering if the style is achievable at home, the honest answer is yes. The thickening spray does much of the work for you, and at under thirty dollars, it’s one of the more accessible celebrity beauty secrets available right now!

Get the BONDIBOOST Thickening Hair Spray for $29 (originally $33) at Amazon! Please note, prices are accurate at the date of publication but are subject to change.