Editor's Tip Editor's Tip

To wake up to gorgeous hair, use the Living Proof® Perfect hair Day™ (PhD) Night Cap Overnight Perfector once a week.

Living proof.® Perfect hair Day™ (PhD) 5-in-1 Styling Treatment

$27.00 Ships Free
4 oz



Can’t get enough of Living proof.®? We feel you. For a limited time, get a free Living proof.® Curl Leave-In Conditioner deluxe sample with qualifying $25+ purchase of any full-size product(s) from the Birchbox Shop. Use code: FRIZZFREE at checkout.

Birchbox Breakdown

By our definition, a perfect hair day doesn’t just mean a flawless ‘do: It means not having to spend hours getting our style just so. This multitasking styler volumizes, smooths, conditions, strengthens, and adds polish all in one simple step—so we can get out the door (and start enjoying that perfect hair day) sooner. It’s formulated with the brand’s patented haircare molecules: PBAE, which adds long-lasting volume and leaves hair manageable, and OFPMA, for softness and shine. What’s more, this do-it-all product blocks UV rays, safeguards color, protects against heat, and works over time to give you smoother, stronger hair. This formula works on all hair types, including color- or chemically-treated hair. It’s made without sulfates, silicone, or oil.

How to Use

Apply a nickel-sized amount to damp hair from roots to ends. Comb through, then blow-dry and style as usual.

Water, Myristyl Alcohol, Maltodextrin/VP Copolymer, Octafluoropentyl Methacrylate (OFPMA), Lauryl Methyl Gluceth-10 Hydroxypropyldimonium Chloride, Behentrimonium Methosulfate, Fragrance/Parfum, Oleyl Alcohol, Polyquaternium-55, Cetyl Alcohol, Butylene Glycol, Steareth-10, PPG-3 Benzyl Ethyl Ethylhexanoate, Phenoxyethanol, Astrocaryum Tucuma Seed Butter, Polyalkylaminoester-1 (PBAE), Steareth-2, Behenyl/Stearyl Aminopropanediol Esters, Myrica Pubescens Fruit Wax, Dipropylene Glycol, Hydroxyethyl Cellulose, C10-40 Isoalkylamidopropylethyldimonium Ethosulfate, DimethylPABAmidopropyl Laurdimonium Tosylate, PPG-2 Myristyl Ether Propionate, Oleth-10, Methylisothiazolinone, Citronellol, Butylphenyl Methylpropional, Limonene, Citral, Geraniol.

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Most Helpful Customer Reviews

Amazing for Fine/Thin Hair!!

I have super thin hair and a lot of products grease up my hair. This product was amazing! I applied it once I got out of the shower. It left my hair soft, silky, and light, gave it tons of volume, and even on the next day my hair felt great and it was not greasy at all.

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My New Favorite!!

I have tried what seems like every product imaginable for my hair. I have curly hair, which is now colored, that I also like to blow dry straight on occasion. Up until now, I've always used individual products depending on the look I want to achieve. Preparing for a recent trip though, I didn't want to take multiple products with me. So, this was AWESOME. It was weightless and left my hair soft while giving my straight hair a nice sheen and keeping my curls super curly when I let it air dry. It's all I've ever wanted in a hair product. My only complaint is that the bottle is so small!

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I LOVE this product. I use this on wet hair (root to tips) after shower, along with some argan oil on my tips. Then I blow dry and style however I want. My style DOES stay longer (the whole next day) and it looks less dirty the next day. More volume... what else can I say. I am a believer.

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Great product for my fine hair!

This product really helps control my nature curl while wearing my hair straight. I live in the south where the humidty works against you, and this product helps keep my hair straight and manageable without weighing down my fine hair.

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It rocks!

My thin, straight and fine hair loves this stuff. I blow dry daily and this protects as well as providing detangling, volume and control. Can't think of a thing bad about it.

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