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OI Duo

OI Duo (Shampoo + Conditioner)

Meet your go-to Davines OI shampoo and conditioner set for effortlessly soft, shiny, touchable hair. The OI Duo pairs OI Shampoo + OI Conditioner to gently cleanse, smooth, and detangle—leaving hair more manageable with a polished, healthy-looking finish.

If your hair feels dry, looks dull, or gets frizzy easily, this is the easiest two-step routine to upgrade your wash day.

Best for

  • Hair that needs softness + shine

  • Frizz-prone or hard-to-manage texture

  • Dry, dull, or dehydrated hair

  • Anyone who wants a simple, everyday smoothing routine

What’s included

  • OI Shampoo (retail size): gently cleanses while helping hair feel softer and smoother

  • OI Conditioner (retail size): hydrates, detangles, and helps calm flyaways for a sleek finish

Why you’ll love it

  • Leaves hair feeling soft, silky, and easier to brush

  • Supports shine + smoothness without feeling heavy

  • Helps reduce the look of frizz and puffiness

  • A simple routine that works for most hair types

How to use

  1. Shampoo: Apply to wet hair, massage into scalp and lengths, then rinse. Repeat if needed.

  2. Condition: Apply to mid-lengths and ends, leave on 2–5 minutes, then rinse thoroughly.

Pro tip from The Colour Bar: For the ultimate shine finish, follow with a lightweight leave-in or oil on damp hair.

Pair it with (recommended add-ons)

  • Add a leave-in for extra softness + shine (great if you heat style)

  • Love it? Upgrade to the OI Liter Bundle for the best value per wash

Bundle details

Routine type: softness + shine + manageability
Includes: OI Shampoo + OI Conditioner (retail sizes)
Great for: starter routine, gifting, or trying OI before committing to liters

We’re here to help!

Questions about products or general inquiries, contact us at:
‪(916) 623-5683‬

Our customer service hours are
Monday – Friday: 9AM – 4PM PST

You can send us a message using our Orders Contact Form.

OI Duo

Original price was: $93.00.Current price is: $84.00.

The OI Duo is a salon-quality shampoo and conditioner set designed to leave hair soft, shiny, and more manageable. Ideal for most hair types—especially hair that feels dry, dull, or frizzy—this two-step routine helps smooth, detangle, and boost healthy-looking shine.

Includes: OI Shampoo + OI Conditioner (retail sizes)
Best for: softness, shine, frizz control, everyday smoothing

Satisfaction Guaranteed
Questions? Call / Text (916) 623-5683

The OI Duo is a salon-quality shampoo and conditioner set designed to leave hair soft, shiny, and more manageable. Ideal for most hair types—especially hair that feels dry, dull, or frizzy—this two-step routine helps smooth, detangle, and boost healthy-looking shine.

Includes: OI Shampoo + OI Conditioner (retail sizes)
Best for: softness, shine, frizz control, everyday smoothing

OI Duo (Shampoo + Conditioner)

Meet your go-to Davines OI shampoo and conditioner set for effortlessly soft, shiny, touchable hair. The OI Duo pairs OI Shampoo + OI Conditioner to gently cleanse, smooth, and detangle—leaving hair more manageable with a polished, healthy-looking finish.

If your hair feels dry, looks dull, or gets frizzy easily, this is the easiest two-step routine to upgrade your wash day.

Best for

  • Hair that needs softness + shine

  • Frizz-prone or hard-to-manage texture

  • Dry, dull, or dehydrated hair

  • Anyone who wants a simple, everyday smoothing routine

What’s included

  • OI Shampoo (retail size): gently cleanses while helping hair feel softer and smoother

  • OI Conditioner (retail size): hydrates, detangles, and helps calm flyaways for a sleek finish

Why you’ll love it

  • Leaves hair feeling soft, silky, and easier to brush

  • Supports shine + smoothness without feeling heavy

  • Helps reduce the look of frizz and puffiness

  • A simple routine that works for most hair types

How to use

  1. Shampoo: Apply to wet hair, massage into scalp and lengths, then rinse. Repeat if needed.

  2. Condition: Apply to mid-lengths and ends, leave on 2–5 minutes, then rinse thoroughly.

Pro tip from The Colour Bar: For the ultimate shine finish, follow with a lightweight leave-in or oil on damp hair.

Pair it with (recommended add-ons)

  • Add a leave-in for extra softness + shine (great if you heat style)

  • Love it? Upgrade to the OI Liter Bundle for the best value per wash

Bundle details

Routine type: softness + shine + manageability
Includes: OI Shampoo + OI Conditioner (retail sizes)
Great for: starter routine, gifting, or trying OI before committing to liters

We’re here to help!

Questions about products or general inquiries, contact us at:
‪(916) 623-5683‬

Our customer service hours are
Monday – Friday: 9AM – 4PM PST

You can send us a message using our Orders Contact Form.

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About Davines

In 1983, Davines was founded in Parma, Italy as a research laboratory that focused on high-end hair care production. Davines spent over a decade experimenting with different formulas for other companies, and eventually decided their expertise could be put towards their very own line, so they did just that. The Davines group now has Davines hair care, founded in 1992, their beloved skincare line Comfort Zone, founded in 1996, and further expanded with Skin Regimen in 2018. Learn more about Davines, go to davines.com

Our business practices

We Ship Fast

We process orders with love + care Monday-Friday and typically ship out orders the same day if they are made before 1pm PST. Otherwise, the order gets processed the next business day.We do our best to get your GOOD HAIR DAY to your doorstep as quickly as possible so you can LOVE YOUR HAIR

All Natural Ingredients

Davines leaves behind sulfates and parabens and puts active-ingredients at the forefront of their products. We humbly take pride in knowing the ins-and-outs of Davines are completely ethical and sustainable and aligned with our very own beliefs.

Love The Products or Your Money Back

As a Davines exclusive salon, it is no surprise that we firmly stand behind their products. We genuinely love the product line and we hope you do too. If for any reason they don’t fulfill your hair dreams, let us know and we’ll process your refund to make it right.

Proud to be a Female Owned Business

The Colour Bar Founder, Lorena Martinez, is a representation of women all around the world who have a dream and go after it wholeheartedly. We are proud to be founded and owned by a female and we thank you for keeping the dream alive through your support.

Buy with confidence – you’re in good hands

You're buying from the best!

Our satisfaction guaranteed policy is our promise to you as our customer. We promise to always be customer-oriented and help you LOVE YOUR HAIR.

  • Top quality products
  • Official Davines reseller
  • Founded in 2010 in Sacramento, CA
  • Voted Best Hair Salon in Sacramento
  • Thousands of happy customers
  • Guaranteed SAFE Checkout
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Friendly customer service

Our staff is here to help you. If you should need any assistance with your product, or have questions about your order, please feel free to call our online orders phone line at: (916) 623-5683 or our hair salon phone line: (916) 583-8785

The Colour Bar Team