See the difference custom can make.
Made-to-order, performance haircare
Cruelty-Free
Sulfate-Free
Paraben-Free
100% Vegan
Dermatologist Tested
Cruelty-Free
Sulfate-Free
Paraben-Free
100% Vegan
Dermatologist Tested
Cruelty-Free
Sulfate-Free
Paraben-Free
100% Vegan
Dermatologist Tested
Cruelty-Free
Sulfate-Free
Paraben-Free
100% Vegan
Dermatologist Tested
Cruelty-Free
Sulfate-Free
Paraben-Free
100% Vegan
Dermatologist Tested
new in
Purple Treatments for Everyone
Discover the newest additions to our Purple Collection, just in time to tone summer brass.
Discover Our Products
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Custom Haircare as Unique as You
At Function, we believe you deserve products that are tailor-made for your unique hair type, needs, goals, and preferences.
Start with our quiz to create your fully custom formulas, crafted with high-performance, precisely-dose ingredients to match your unique hair needs. Choose your goals, fragrance, and colors.
With years of data, each formula evolves with your changing needs to deliver instant results you will love.
How It Works
Your Hair Meets Our Science
1
Take the Quiz
Tell us about your hair texture and structure, your scalp, and all of your hair goals.
How We Function
We carefully review every ingredient for safety and performance. Our formulas are science-based and vegan, prioritizing naturally-derived ingredients in optimized dosages based on your hair’s needs. We are cruelty-free, and free of sulfates, parabens, and formaldehyde donors.
All our products undergo a rigorous testing process under dermatological control as well as with stylists. Each step of our formulation and production process in our labs and factories follows stringent quality control protocols.
Haircare as Unique as You
of sammy
Wavy Hair
Medium
Dry
Beet Root Extract
Helps prevent split ends, improves elasticity and moisturizes.
Cactus Extract
Fights free radicals and protects the hair from thermal heat damage.
Quinoa Protein
Strengthens, provides brilliant shine, and improves manageability.
30-day Healthy Hair Guarantee
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30-day Healthy Hair Guarantee
Subscribe Risk-Free
30-day Healthy Hair Guarantee
Subscribe Risk-Free
30-day Healthy Hair Guarantee
Subscribe Risk-Free
30-day Healthy Hair Guarantee
Subscribe Risk-Free
Personal + Proven Results
(73,031)
This stuff is UNREAL! After just ONE use my hair felt better than it has in years.
Sydney
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