[Skip to content](/content/pages/home#MainContent/index.html) SearchClear AllClose drawer Close drawer [My Bag\\ (0)](/content/cart/index.html) # Your cart Your cart is currently empty. ## Order Details Subtotal $0.00 Shipping & Taxes Calculated at Checkout Proceed to Checkout Clear AllSearchClose drawer [Sign In](https://account.functionofbeauty.com/) Search [TAKE THE QUIZ](/content/pages/hair-quiz/index.html) Close drawer Subscribe & Save Get 20% off your first subscription Free Shipping on Orders Over $75 Free standard shipping applies to one-off orders over $75 shipping to the United States or Canada. Offer excludes subscription orders and expedited shipping methods. Terms and conditions apply. Previous ### Award-Winning Haircare ## Shining the spotlight on _you_ [Customize \\ My Formula](/content/pages/hair-quiz/index.html) ## Custom Sets Real Results Your shortcut to better hair: curated routines designed to fix the issues you know too well - fast [Shop Sets](/content/pages/shop-all-custom-sets-and-routines/index.html) ### Award-Winning Haircare ## Shining the spotlight on _you_ [Customize \\ My Formula](/content/pages/hair-quiz/index.html) ## Custom Sets Real Results Your shortcut to better hair: curated routines designed to fix the issues you know too well - fast [Shop Sets](/content/pages/shop-all-custom-sets-and-routines/index.html) ### Award-Winning Haircare ## Shining the spotlight on _you_ [Customize \\ My Formula](/content/pages/hair-quiz/index.html) Next - 1 - 2 100% Vegan Dermatologist Tested cruelty - free sulfate - free paraben - free 100% Vegan Dermatologist Tested cruelty - free sulfate - free paraben - free 100% Vegan Dermatologist Tested ### SOS: REVOLUTIONARY REPAIR # One Use. Total Transformation. Restore softness, shine and split ends by zeroing in on your hair type, goals, and styling habits with a patent-pending formulation designed only for your hair’s unique needs. [Discover More](/content/pages/sos-haircare/index.html) - - - - \\ \\ **SOS Custom Repair Conditioner** \\ \\ $29.00](/content/products/sos-conditioner/index.html) - \\ \\ **SOS Custom Repair Leave-in Treatment** \\ \\ $34.00](/content/products/sos-leave-in-treatment/index.html) - \\ \\ **SOS Custom Repair Hair Mask** \\ \\ $38.00](/content/products/sos-hair-mask/index.html) - \\ \\ **SOS Custom Repair Shampoo** \\ \\ $32.00](/content/products/sos-shampoo/index.html) SCIENTIFICALLY PROVEN, BACKED BY DATA 2x stronger hair 
90% less breakage \*complete SOS system vs untreated hair, instant and 4 weeks results BEFORE AFTER Results on wavy, highlighted hair “This SOS Custom Repair saved my strands! My hair feels so much healthier, my frizz is under control and spilt ends are banished. I can’t stop touching my soft hair.” - Jessica Wavy Thin Highlights Heat Styling BEFORE AFTER Results on curly, highlighted hair “My hair walks into a room before I do, so I’m looking for ways to take care of it. With SOS Custom Repair I know my curls will stay hydrated and frizz-free even if I sneak in a few heat styling moments throughout the week.” - Brenda Curly Medium Highlights Heat Styling BEFORE AFTER Results on highlighted, straight hair “My hair feels so soft, nourished and hydrated after using SOS Custom Repair. The Leave-In Treatment is my go-to every time I wash my hair.” -Yoko Straight Thin Highlights Heat Styling BEFORE AFTER Results on colored, coily hair “I love experimenting with my hair color which means I need to prioritize hair health to prevent breakage. SOS Custom Repair is my secret weapon to keeping my coils healthy while I keep being me.” -Keturah Coily Thick Colored Heat Styling Real Repair Stories, Real Joy HOW YOU FUNCTION [@kendall.toole](/content/pages/home/index.html) "You can visibly see a difference after just one use!" Kendall [@marissa\_lanae](/content/pages/home/index.html) “It adds strength, hydration, frizz-control and most important to me it adds heat protection up to 450°.” Marissa [@slaymiya1](/content/pages/home/index.html) "I’ve seen a huge improvement in my curls, including less breakage and elasticity even after I manipulate them." Samiya Pause How it works ## Two Steps to Custom Haircare 1. You take a quick, two-minute quiz about your hair history, goals, damage and styling habits. 2. We formulate made-to-order, tailored haircare, prioritizing naturally-derived ingredients, and ship it to you. [Take the Quiz](/content/pages/hair-quiz/index.html) [shopall](/content/collections/shop-all-products/index.html) - [>\\ bestseller](/content/products/shampoo/index.html) Custom ShampooFrom $29.00 customize now - [>\\ Custom ConditionerFrom $29.00 customize now - [>\\ Custom Hair MaskFrom $26.00 customize now - [>\\ frizz fighter](/content/products/hair-serum/index.html) Custom Hair SerumFrom $31.00 customize now - [>\\ Custom Co-WashFrom $22.00 customize now - [>\\ Custom Leave-in ConditionerFrom $24.99 customize now - [>\\ EXTRA 10% OFF](/content/products/body-lotion/index.html) Custom Body LotionFrom $36.00 customize now - [>\\ EXTRA 10% OFF](/content/products/body-wash/index.html) Custom Body WashFrom $36.00 customize now Clean. Vegan. Cruelty-Free. ## The Function Standard With Function of Beauty, you are guaranteed a highly efficacious formula with no compromises. Always clean, vegan, and cruelty-free, our formulas focus on naturally-derived ingredients and powerful science to meet high efficacy and testing standards. [Learn More](/content/pages/about/index.html) Browse by Category [FIND MYFORMULA](/content/pages/hair-quiz/index.html) Haircare [SHOPALL](/content/collections/shop-all-products/index.html) [FIND MYFORMULA](/content/pages/skin-quiz/index.html) Skincare [SHOPALL](/content/collections/shop-all-products/index.html) [FIND MYFORMULA](/content/pages/body-quiz/index.html) Bodycare [SHOPALL](/content/collections/shop-all-products/index.html) Still Unsure? Don’t stress. We've paved our quiz like a yellow brick road. Just a two-minute detour from your day, and spoiler: there's no Wicked Witch at the end, just perfect hair days. 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