Custom Repair Leave-in Treatment – Repair Damage & Smooth Frizz | Function of Beauty

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SOS Custom Repair Leave-in Treatment

4.2 Read 334 Reviews. Same page link.

(334)

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Experience a remarkable hair transformation after JUST one use with our most advanced repair product. This lightweight, cream-gel formula boasts the highest concentration of our cutting-edge Custom Biotech Repair, alongside nutrient-rich antioxidants. Dermatologist tested and fully customized to the unique needs of your hair type and damage level. Bonus! This product is 3oz and TSA compliant.

Customize to You

Not sure what you need? Take our quiz.

customize Name

function of:

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hair type

Select your hair type
WavyLoose s-shaped pattern found throughout.
StraightNo bend or curl.
CurlyDefined curl or spiral pattern to it.
CoilyTightly packed curls.

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hair goals (select up to 5 )

Tame frizz

Define curls

Deep condition

Fix splits ends

Hydrate

Length

Nourish

Replenish

Amplify shine

Scalp care

Strengthen

Straighten

Volumize

Anti-breakage

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{"keyName":"Hair Goals","quantityToSelect":5}

hair thickness

MediumThick as a strand of thread.
CoarseThicker than a strand of thread.
FineThinner than a strand of thread

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scalp moisture

BalancedMy scalp doesn't feel too dry or too oily.
OilyMy roots feel flat or greasy
DryMy scalp is tight and uncomfortable

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damage

Low DamageI don't color my hair or use a semi-perm color. Occasional use of heat tools, daily brushing.
Medium DamagePermanent hair color, daily use of heat tools.
High DamageBleach, Keratin treatments, perming, and/or frequent heat tool use.

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fragrances

FloretFloret - fresh, floral, rose, gardenia with earthy sandalwood
Vanilla suedeVanilla suede - vanilla, jasmine, sandalwood
Go cocoGo coco - rich, creamy coconut and sweet hints of honeysuckle
Strike a roseStrike a rose - rose, blackcurrant, sandalwood, orange blossom
Fragrance freeFragrance free - for sensitive scalp

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Ingredients List

Purchase options

$34.00

$27.20

Delivery every 2 MonthsDelivery every 3 MonthsDelivery every 4 Months

One-Time Purchase

$34.00

Quantity

add to cart

About Silicones

Silicones are synthetic ingredients known for improving smoothness, shine and ease of detangling. However, some find silicone can weigh down their hair. Our silicone is a lightweight formulation that will work for most. In haircare, silicones are used to create slip, help smooth and protect from heat.

Ingredients List

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,
{
"text": "Oily",
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,
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,
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]

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"id": "47937333756216",
"sku": "sos-leave-in-treatment.3oz.magenta",
"color": "Magenta",
"value": "Magenta",
"image": "//functionofbeauty.com/cdn/shop/files/SOS_Leave-In_Treatment_Pink_Reflection_1600x.progressive.png.jpg?v=1744744289",
"enable": true
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,
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false

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"dataKey": "anti-frizz",
"image": "//functionofbeauty.com/cdn/shop/files/Tame_Frizz.svg?v=1730820668",
"name": "Tame frizz"
}
,
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,
{
"dataKey": "fix-split-ends",
"image": "//functionofbeauty.com/cdn/shop/files/fix_split_ends.svg?v=1733950390",
"name": "Fix splits ends"
}
,
{
"dataKey": "hydrate",
"image": "//functionofbeauty.com/cdn/shop/files/deep_hydration_img.svg?v=1733950390",
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}
,
{
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}
,
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,
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,
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[]

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Key Benefits

Repair made for you

A personalized experience tailored to your hair type, goals, and level of damage, with preferred fragrance and color.

Clean, dermatologist tested

Sulfate-free, paraben-free, vegan and always cruelty-free.

Luxurious, caring textures

Lightweight, cream-gel texture gives a clean, no-product feel while drastically helping hair manageability when wet.

Scientifically proven results

Heat protectant up to 450°. Prevents split ends and future breakage by strengthening hair from the inside out.

Key Ingredients

Tara Pod Extract

Derived from the Tara tree, native to South America, this ingredient is renowned for its richness in antioxidants, which help repair damaged hair.

Sunflower Sprout Extract

Harvested from the sprouting seeds of sunflowers, this ingredient is nutrient-dense provides essential nourishment and moisture to damaged hair.

Biotech Powered Custom Repair

Combining the potent synergy of two naturally-derived bonding actives this U.S. patent-pending technology targets and repairs hair damage on both the cuticle layer and the core.

How To Use

1. Cleanse

Sulfate-free shampoo, crafted with coconut-derived surfactants to create a luxurious, foamy lather. Targets and improves frizz, dryness, and lack of shine in damaged hair.

2. Condition

Strengthening conditioner enriched with Daikon Seed Extract, promotes manageability, softer, shinier strands with body. Restorative hair mask infused with Mango Seed Butter, abundant in vitamins A and E for nourishment. Use weekly in lieu of conditioner for intensified nourishment, or after hair coloring or processing treatments to deeply condition.

3. Treat

Transformative leave-in treatment offers continuous benefits, safeguarding against damage. Helps to penetrate the hair to deliver nourishment, hydration, frizz-control, exceptional manageability and hair smoothness. The must add-on to any routine!

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SOS Custom Repair Shampoo

$32.00

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SOS Custom Repair Conditioner

Starting at $29.00

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SOS Custom Repair Hair Mask

$38.00

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Custom Styling Primer

SOS Custom Repair Shampoo

$32.00

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SOS Custom Repair Conditioner

Starting at $29.00

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SOS Custom Repair Hair Mask

$38.00

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Custom Styling Primer

Frequently Asked Questions

What type of hair does SOS Custom Repair work for?

SOS Custom Repair works for all types, thanks to a two-minute quiz that generates a custom formula based on your exact needs

How do I create my SOS Custom Repair routine?

Simply take our quick, two-minute quiz that assesses your damage level across chemical, mechanical, and heat styling. Based on your results, we'll recommend a tailored routine of custom-made products to help you achieve your healthiest hair yet.

Do I need to use the full SOS Custom Repair routine?

For optimal results, we recommend following the complete SOS Custom Repair routine. However, integrating any repair product into your regimen is always beneficial if you're experiencing any type of damage.

Is the SOS Custom Repair routine color-safe?

Yep! And its not just color-safe; it's also paraben-free, cruelty-free, vegan, and dermatologist-tested.

[

{
"header": "What type of hair does SOS Custom Repair work for?",
"body": "SOS Custom Repair works for all types, thanks to a two-minute quiz that generates a custom formula based on your exact needs"
},

{
"header": "How do I create my SOS Custom Repair routine?",
"body": "Simply take our quick, two-minute quiz that assesses your damage level across chemical, mechanical, and heat styling. Based on your results, we'll recommend a tailored routine of custom-made products to help you achieve your healthiest hair yet."
},

{
"header": "Do I need to use the full SOS Custom Repair routine?",
"body": "For optimal results, we recommend following the complete SOS Custom Repair routine. However, integrating any repair product into your regimen is always beneficial if you're experiencing any type of damage."
},

{
"header": "Is the SOS Custom Repair routine color-safe?",
"body": "Yep! And its not just color-safe; it's also paraben-free, cruelty-free, vegan, and dermatologist-tested."
}

]

Reviews

Rating Snapshot

Select a row below to filter reviews.

5 starsstars

220

220 reviews with 5 stars.

4 starsstars

33 reviews with 4 stars.

3 starsstars

29 reviews with 3 stars.

2 starsstars

19 reviews with 2 stars.

1 starstars

33 reviews with 1 star.

Overall Rating

4.2

334 Reviews

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Summary of Reviews

AI-generated from customer ratings & reviews, and may include incentivized reviews.

Customers overwhelmingly praise the leave-in treatment for delivering noticeably softer, silkier hair with enhanced shine and health. Most appreciate its lightweight texture that adds moisture without...

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Rating

Hair Type:

1 to 8 of 334 Reviews .

1 – 8 of 334 Reviews

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Most Recent

Karen

Review 1

Vote 2

5 out of 5 stars.

leave in treatment

a month ago

I've only used the SOS custom repair leave in treatment a couple times but so far I am loving it. It leaves my hair very soft and silky.

Helpful?

1 Helpful(1)

1 Not helpful(1)

Report

Response from Function of Beauty:

19 days ago

Customer Support

Hi Karen, Thank you for your review and for confirming that our "3x smoother hair in 1 use" claim truly delivers!

Tee

Review 1

Vote 2

Hair Type:Wavy

Hair Texture:Medium

5 out of 5 stars.

Love it!

2 months ago

Excellent product, smells great and helps with frizz

Helpful?

1 Helpful(1)

1 Not helpful(1)

Report

Response from Function of Beauty:

a month ago

Customer Support

Hi Tee, Thank you so much for your 5-star review! We're thrilled to hear that you're loving your experience with us. If you ever have any questions or need anything, we're always here to help. Enjoy!

R.J.

Review 1

Vote 3

5 out of 5 stars.

Smooths and removes tangles

4 months ago

My daughter bout this and when I tried it I love it.

Helpful?

1 Helpful(1)

2 Not helpful(2)

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Marissa

Review 1

Vote 1

Hair Type:Straight

Hair Texture:Fine

5 out of 5 stars.

A Must Have!

5 months ago

I love this product so much I keep an extra bottle on hand. It makes my hair silky, shiny and very soft without taking away any body. The fragrance is an added plus!

Helpful?

1 Helpful(1)

0 Not helpful(0)

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Brandit

Review 1

Votes 3

Hair Type:Wavy

Hair Texture:Fine

4 out of 5 stars.

My hair needed this!!!

5 months ago

The SOS treatment leaves hair soft & shiny without the oily look. The bottle pumps a pea size amount of product out at a time, which I love. The consistency is like a lotion, and it smooths into my hair effortlessly. I have such dry ends from getting my hair bleached for highlights and using this makes me feel like I don't have a ton of split ends, but actually have healthy hair.

The packaging components could use some work. The cap comes loose, and I'm not sure how the airless pump mechanism will work since I just started using it. (as a Process Engineer for personal care products, I can't help but inspect packaging).

But the SOS treatment is what matters, and it is amazing!!! I would rate it a 5/5.

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Helen R

Review 1

Votes 0

Hair Type:Straight

Hair Texture:Fine

5 out of 5 stars.

Perfect solution for fine hair

6 months ago

Finding the right conditioner is difficult when you have fine and oily hair, and some conditioners either contribute to oiliness or weigh the hair down. With SOS leave-in conditioner I don’t have these problems, a little goes a long way, leave my hair fresh with a healthy shine. I haven’t used it long enough yet, but looking forward to improving my overall hair condition and I am confident this product will help me get there.

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Izzy B

Reviews 2

Votes 0

Hair Type:Straight

Hair Texture:Fine

5 out of 5 stars.

Love this treatment!!

7 months ago

This treatment made my hair feel light and airy!! It is so dry and brittle in the winter and this Leave in helped perk it up without making it greasy!

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Gabriella O.

Review 1

Votes 3

5 out of 5 stars.

Best products ever hás brought

10 months ago

Best products ever hás brought my hair back to life is so healthy and strong and 100p buy if you have curly hair do the test and let it do wonders

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Response from Function of Beauty:

10 months ago

Hi Gabriella,

Curly hair thrives with hydration. We love hearing that our shampoo cleanses your hair and keeps the moisture that you need for beautiful curls!

No questions have been asked about this product.

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