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Studio Joi

Hair salon in Mill Valley, CA

Rated 4.9 out of 5 (43 on Google Maps) (opens in a new tab)

Studio Joi is a hair salon in Mill Valley that was set up after Sausalito Signatures, a salon co-founded by owner Joi Gayles in 1988. The salon works with a multicultural clientele and with all hair textures, curl patterns and conditions, and it is known for cutting and caring for curly and textured hair of every type.

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About

Studio Joi is a hair salon in Mill Valley that was set up after Sausalito Signatures, a salon co-founded by owner Joi Gayles in 1988. The salon works with a multicultural clientele and with all hair textures, curl patterns and conditions, and it is known for cutting and caring for curly and textured hair of every type.

Hair therapy rituals are the core of the menu. The Hydration Reset is offered without a style at $120, and the Style with Hydration Duo adds a style for $160. The Repair and Revitalize Ritual at $180 includes an aromatic scalp massage, deep moisture therapy, a revitalizing mask and a blow-dry, while the Texture Embrace and Nurture at $220 pairs a precision cut for the natural pattern with steam, hydration, curl support and a diffused or natural style. The Holistic Hair and Wellness Experience at $350 combines therapy, red light treatment, a steam session, a haircut and Earth2Tonics products. Hydration treatments use custom natural masks made from clays, herbs and essential oils. Three-visit packages are available for several rituals. Color services, listed at $145, include virgin color, touch-ups, highlights, corrective color and henna and plant dyes, and henna is offered as a chemical-free option.

Red light therapy sessions run 20 minutes for $49 and can be done seated or lying down. They can be focused on hair growth and scalp balance, facial rejuvenation, or sore or tight muscles. Bundles range from four to ten sessions, and a monthly membership at $159 covers unlimited weekly 20-minute sessions. The salon describes red light therapy as a proven, drug-free boost for thicker, stronger hair growth, and it points to studies of 650 nm red light in people with pattern hair loss, reporting increases in hair count. The salon also offers scalar field therapy, starting with a complimentary introduction that includes a 30-minute session, along with Rife frequency healing at The Field at Studio Joi.

Education is part of most visits. The Family Curl Care Lesson is for parents and their curly-haired children and ends with a written home care guide. The Personal Hair Ritual Lesson is a one-to-one adult session that assesses texture, porosity and scalp. The Studio Joi Group Hair Rituals Workshop is a small group session on texture, porosity, hydration versus moisture and product choice. Monthly Socials bring together Studio Joi, The Field and Earth2Tonics with guest presenters and local artisans, covering topics such as holistic hairstyling, sound baths, light therapy, plant medicine and botanical elixirs. The three businesses are combining under the Resonance In Alignment name, which the group describes as a community platform joining beauty, frequency healing and nature-based wellness.

Holistic hair care built on herbal infusions, aromatherapy and natural remedies for hair and scalp, with sessions that teach clients how their hair behaves and how to care for it at home.

A calm space with music, gentle aromatherapy and a view of the bay.

Specials & promotions

  • Complimentary Scalar Introduction with 30 minute session

    Offered through the end of the year; call to schedule. Includes hands-on access to medical-grade Scalar equipment, educational literature, and a 30 minute session in the Creative Space, Zen Zone, or Power Rest.

    Valid through Dec 31, 2026 · Where we saw it

  • Hydration Reset package: 3 visits for $310

    $310

    Package: 3 visits

    On their website as of Oct 30, 2026 · Where we saw it

  • Style with Hydration Duo package: 3 visits for $450

    $450

    Package: 3 visits

    On their website as of Oct 30, 2026 · Where we saw it

  • Total Therapy Ritual package: 3 visits for $540

    $540

    Package: 3 visits

    On their website as of Oct 30, 2026 · Where we saw it

Services

Final prices may vary.

Virgin color, touch-ups, highlights, corrective color and henna and plant dyes, the chemical-free option, listed at $145.

  • Color touch-up $145
  • Corrective color $145
  • Henna and plant dyes $145
  • Highlights $145
  • Virgin color $145
  • Color $145/unit
  • Henna & Plant Dyes Price at booking

Family and personal curl and hair ritual lessons and a small group workshop on hair texture, porosity and product choice.

  • Family Curl Care Lesson Price at booking
  • Personal Hair Ritual Lesson Price at booking
  • Studio Joi Group Hair Rituals Workshop Price at booking

Men's cuts starting at $75 and women's cuts starting at $140.

  • Men's haircut $75
  • Women's haircut $140

Hydration resets, styling rituals, repair and texture-focused treatments, holistic wellness experiences, and add-on masques, steam, high frequency and scalp treatments, with three-visit packages.

  • The Hydration Reset (no style) $120
  • Style with Hydration Duo $160
  • Repair and Revitalize Ritual $180
  • Repair & Revitalize Ritual $180
  • The Total Therapy Ritual (premium treatment and style) $198
  • The Total Therapy Ritual (Premium Treatment + Style) $198
  • Texture Embrace and Nurture $220
  • Texture Embrace & Nurture $220
  • The Hydration Reset, 3 visits $310
  • THE HYDRATION RESET (NO STYLE) Package: 3 visits $310
  • Holistic Hair and Wellness Experience $350
  • Holistic Hair & Wellness Experience $350
  • Style with Hydration Duo, 3 visits $450
  • STYLE WITH HYDRATION DUO Package: 3 visits $450
  • The Total Therapy Ritual, 3 visits $540
  • THE TOTAL THERAPY RITUAL (PREMIUM TREATMENT + STYLE) Package: 3 visits $540
  • Customized hair masque Price at booking
  • Hair steaming treatment Price at booking
  • High frequency therapy Price at booking
  • Scalp treatment Price at booking

Single 20-minute red light sessions for $49, plus a monthly unlimited membership.

  • Red light therapy session $49
  • Monthly Maintenance Membership, unlimited 20-min red light $159
  • Radiant Skin and Glow Package, 4 sessions $219
  • Revive and Reset Series, 5 sessions $225
  • Muscle Ease and Movement Support, 5 sessions $245
  • Scalp and Growth Accelerator Plan, 6 sessions $279
  • Complete Wellness Combo, 10 sessions $449
  • 6. Monthly Maintenance Membership $159/unit
  • 3. Radiant Skin & Glow Package $219
  • 1. Revive + Reset Series $225
  • 4. Muscle Ease + Movement Support $245
  • 2. Scalp + Growth Accelerator Plan $279
  • 5. Complete Wellness Combo $449

Blow-dries, flat iron or curling iron styling, braid styles, and full head braids or twists starting at $400.

  • Braid style $50
  • Blow dry $60
  • Flat iron or curling iron $75
  • Full head braids or twists $400
  • Flat Iron | Curling Iron $75+
  • Full Head Braids | Twists $400+
  • MEN $75+
  • Women $140+

Meet the team

Team members listed on their website. Individual roles, credentials, and current employment have not been independently verified.studiojoi.com (opens in a new tab)

Highlights
  • Cutting and caring for curly, textured and natural hair of all types
  • Hair rituals built on custom natural masks, herbal rinses and steam hydration
  • Red light therapy sessions, bundles and an unlimited monthly membership
  • Earth2Tonics, a plant-based line of handcrafted, botanical products
  • Family and one-to-one curl and hair ritual lessons, plus a small group workshop
  • Cancellations within 24 hours of the appointment are charged 50% of the scheduled cost
Good for
  • curly hair
  • natural and textured hair
  • multicultural hair care
  • parents and curly-haired children
  • chemical-free color
  • hair and scalp rituals
  • red light therapy
  • clients who want to learn a home care routine
Treats
  • hair hydration
  • custom shades and grey transitions
  • corrective color
  • hair growth and scalp balance
  • facial rejuvenation
  • sore or tight muscles
Techniques
  • curly and textured hair cutting
  • henna and plant dyes
  • corrective color
  • highlights
  • red light therapy
  • scalar field therapy
  • Rife frequency healing
  • steam hydration
  • custom natural masks
  • aromatic scalp massage

Products & treatments

  • Earth2Tonics

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