Editor's TipEditor's Tip

For ultra-healthy locks, apply Super Comb Prep & Protect after deep conditioning with Number 4 Lumiere d'hiver Reconstructing Masque.

Number 4 Hair Care

Birchbox Breakdown

After years of relying on blow dryers and irons day after day to score frizz-free locks (and, unfortunately, also seeing the resulting damage and dryness), we were skeptical of a regimen that promised shiny strands without the merest hint of heat. But then we met this kit, and we became believers: a three-step system that hydrates, protects, and leaves hair lustrous, no hot tools required.

How it Works

The sulfate- and sodium chloride-free hydrating shampoo seals in moisture and softens strands, while the jojoba-infused hydrating condition tackles frizz, dryness, and split ends. Super Comb™ Prep & Protect leave-in conditioner effortlessly detangles with nutrient-rich botanicals, at the same time protecting hair from sun damage with built-in UV filters. Finally, Fluoro5 Elixir™ Restore & Repair Oil revives, conditions, and adds plenty of gloss. 

How to Use

Apply one or two pumps of the hydrating shampoo to wet strands, massage into hair, and rinse thoroughly. Follow with Hydrating Condition. Out of the shower, squeeze excess moisture from hair and gently towel dry. Holding the Super Comb™ Prep & Protect spray bottle upright, spritz product evenly. Using a wide-toothed comb or your fingers, gently work the product through hair from root to tip. For addition shine and frizz control, work a few drops of the Fluoro5 Elixir™ Restore & Repair Oil into damp locks.

Hydrating Shampoo: Water, Sodium Cocoyl Isethionate, Sodium Lauryl Sulfoacetate, Cocamidopropyl Hydroxysultaine, Disodium Laureth Sulfosuccinate, Sodium Lauroyl Sarcosinate, Cocamidopropylamine Oxide, Fragrance (Parfum), Divinyldimethicone/Dimethicone Copolymer, Glycereth-26, Glycol Distearate, Gluconolactone, Disodium Cocoyl Glutamate, Lauryl Alcohol, Decyl Glucoside, Quaternium-91, Panthenol, Guar Hydroxypropyltrimonium Chloride, Amodimethicone, PPG-3 Benzyl Ether Myristate, Sodium Benzoate, PEG-120 Methyl Glucose Dioleate, Sodium Cocoyl Glutamate, C11-15 Pareth-7, Trisodium Ethylenediamine Disuccinate, Laureth-9, Glycerin, C12-13 Pareth-23, C12-13 Pareth-3, Polyquaternium-7, Dihydroxypropyl PEG-5 Linoleammonium Chloride, Trideceth-12, Linalool, Helianthus Annuus (Sunflower) Seed Oil, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Sodium Ascorbyl Phosphate, Hydrolyzed Soy Protein, Macrocystis Pyrifera Extract, Ribes Grossularia Fruit Extract, Ribes Nigrum (Black Currant) Leaf Extract, Yogurt Extract, Arctium Lappa Root Extract, Avena Sativa (Oat) Kernel Extract, Camellia Sinensis Leaf Extract, Chondrus Crispus (Carrageenan) Extract, Cymbopogon Schoenanthus Extract, Euterpe Oleracea Fruit Extract, Garcinia Mangostana Peel Extract, Hibiscus Sabdariffa Flower Extract, Hydrastis Canadensis (Golden Seal) Root Extract, Ilex Paraguariensis Leaf Extract

Hydrating Condition: Water, Cyclopentasiloxane, Cetearyl Alcohol, Stearyl Alcohol, Cetrimonium Chloride, Behentrimonium Methosulfate, Fragrance, Glycereth-26, Dimethiconol, Divinyldimethicone/Dimethicone Copolymer, Gluconolactone, Cetrimonium Bromide, Panthenol, PPG-3 Benzyl Ether Myristate, Jojoba Esters, Quaternium-91, Amodimethicone, Hydroxyethylcellulose, Cetrimonium Methosulfate, Sodium Benzoate, C11-15 Pareth-7, PEG-45M, Laureth-9, Glycerin, Butyrospermum Parkii (Shea Butter), Aminomethyl Propanol, C12-13 Pareth-23, C12-13 Pareth-3, Cinnamidopropyltrimonium Chloride, Trideceth-12, Citric Acid, Cinnamyl Alcohol, Helianthus Annuus (Sunflower) Seed Oil, Ethylhexyl Methoxycinnamate, Sodium Ascorbyl Phosphate, Butylene Glycol, Helianthus Annuus (Sunflower) Seed Extract, Hydrolyzed Soy Protein, Macrocystis Pyrifera Extract, Ribes Nigrum (Black Currant) Leaf Extract, Yogurt Extract, Tocopheryl Acetate, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Arctium Lappa Root Extract, Camellia Sinensis Leaf Extract, Chondrus Crispus (Carrageenan) Extract, Euterpe Oleracea Fruit Extract, Garcinia Mangostana Peel Extract, Hibiscus Sabdariffa Flower Extract, Ilex Paraguariensis Leaf Extract

Supercomb Prep & Protect: eau/water, amodimethicone, peg-40 hydrogenated castor oil, cetrimonium chloride, glucose, panthenol, parfum/fragrance, cetrimonium carboxydecyl peg-8 dimethicone, sodium pca, citric acid, cinnamidopropyltrimonium chloride, trideceth-12, magnesium sulfate, hydroxyethylcellulose, trisodium ethylenediamine disuccinate, hydrolyzed soy protein, hydrolyzed vegetable protein pg-propyl silanetriol, glycerin, sodium ascorbyl phosphate, lactoperoxidase, glucose oxidase, macrocystis pyrifera extract, ribes grossularia fruit extract, ribes nigrum (black currant) leaf extract, chondrus crispus (carrageenan) extract, euterpe oleracea fruit extract, garcinia mangostana peel extract, helianthus annuus (sunflower) seed oil*, arctium lappa root extract*, avena sativa (oat) kernel extract*, camellia sinensis leaf extract, cymbopogon schoenanthus extract, hibiscus sabdariffa flower extract*, hydrastis canadensis (golden seal) root extract*, ilex paraguariensis leaf extract* *certified organic by QCS

Fluoro5 Elixer Restore & Repair Oil: Cyclopentasiloxane,C13-14 Isoparaffin,Dimethicone,Dimethiconol,Phenyl Trimethicone,Perfluorononyl Dimethicone,Fragrance (Parfum),Benzyl Salicylate,Butylphenyl Methylpropional,Linalool,Hydroxyisohexyl 3- Cyclohexene Carboxaldehyde,Ethylhexyl Methoxycinnamate,Argania Spinosa Kernel Oil,Helianthus Annuus (Sunflower) Seed Oil,Glycerin,Sodium Ascorbyl Phosphate,Hydrolyzed Soy Protein,Macrocystis Pyrifera Extract,Ribes Grossularia Fruit Extract,Ribes Nigrum (Black Currant) Leaf Extract,Arctium Lappa Root Extract,Avena Sativa (Oat) Kernel Extract,Camellia Sinensis Leaf Extract,Chondrus Crispus (Carrageenan) Extract,Cymbopogon Schoenanthus Extract,Euterpe Oleracea Fruit Extract,Garcinia Mangostana Peel Extract,Hibiscus Sabdariffa Flower Extract,Hydrastis Canadensis (Golden Seal) Root Extract,Ilex Paraguariensis Leaf Extract

More for You!
  • Product orders $50+ and all monthly box brands ship free
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  • Extra samples and gifts in the Bonus Shop

Product Reviews & Sample Feedback

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Most Helpful Customer Reviews

I'm a believer!

I was really excited to get Number4 Beat the Heat in my birchbox this month; it was reviewed so highly! I really felt like it made an immediate difference in the texture of my hair. I will likely be purchasing this guy!

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Love Love Love
Purchased

I am loving this Number 4 kit. My hair feels and smells great! I have really long hair and it makes getting a comb through it much easier.

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The products are decent but not the best
Purchased

The shampoo and conditioner are nice, but you need way more conditioner than shampoo and then you are out of conditioner before shampoo. The prep and protect spray is just o.k., but the serum is very good. It is the best of the products. It is very light weight and has a nice clean smell to it. It helps leave your hair glossy and frizz free without being greasy.

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Great products
Purchased

Number 4 products do a wonderful job with my naturally curly hair, which I blow dry and flat iron frequently. I love the smell too. The only bad thing about this kit is the size of the shampoo and conditioner. They are very small. But yet you get a full size bottle of Super Comb Prep and Protect. I was expecting bigger sizes of the shampoo/conditioner.

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Love
Purchased

Love using the Number 4 Super Comb Prep & Protect. It makes me feel so much better about torturing my hair on a daily base with heat. When I was purchasing it I saw this exclusive bag so I had to have it.

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Perfect Heat Defying Kit
Purchased

My hair is tortured daily, between washing, blow drying and straightening irons; it gets quite the work out. First the Shampoo and Conditioner leaves your hair so silky and smooth you don't even need a detangler. If you go back to a regular mass produced shampoos from the grocery store you will notice an enormous difference. Then you get to put in the Restore and Repair oil (they recommend before and after you style). This oil definitely helps keep the hair silky and hydrated. The Super Protect and Prep leave in spray does exactly what you expect. It also has an anti-static feature, when I wasn't battling frizzy hair it was always static for some reason. All of these products combined makes my hair look amazing and perfectly soft to touch. These products won't weigh down your hair, in fact they do the opposite. I definitely recommend all four products if you beat up your hair and want effortless protection.

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Wow! My hair was so soft!

I have naturally curly, regularly dyed hair that I blow out often. These products worked great to keep my hair shiny and frizz free even up against summer humidity and high heat. The scent is really nice as well. I found myself spraying a little extra on my dirty clothes in my suitcase. I would definitely recommend these products.

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Good product.

I have dry, damaged hair because of constantly blow drying, straightening, and curling my hair which is incredibly long and unruly to begin with so it only makes matters worse. These products have helped me restore some of my hairs health and help make it that much easier for me to tame. Healthy hair is happy hair! ;)

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Love with this kit!
Purchased

I have thick, frizzy, curly hair and am always looking for new ways to "tame" it. This set is wonderful!!! Since using this kit, my hair is so much softer and much more manageable. Is my hair entirely frizz free? Nope. But it is so much better than before. I would give this product a full five stars if it could indeed leave my hair entirely lustrous without hot tools :) But overall, really great product! I bought the shampoo and conditioner in the full size because I liked it so much--just a forewarning, the full sizes are pricey.

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LOVE IT!!
Purchased

Received the leave in conditioner in my August Birchbox and loved it with my normal everyday products. Purchased this Heat Kit and now love the Shampoo and Conditioner just as much as the leave in conditioner!!

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