A green Ethique Curl-Defining Solid Shampoo Bar, partially covered in white suds, sits beside its turquoise and white packaging labeled “Curl-Defining Solid Shampoo Bar, Professor Curl, 80 uses, 110g.”. A turquoise box of Ethique Curl-Defining Solid Shampoo Bar, labeled “Professor Curl” for curly hair. The box indicates it weighs 110g (3.80 oz) and provides 80 uses. A teal box of curl-defining solid shampoo bar labeled Professor Curl with features like creamy coconut & lemongrass, curl care principles, and color-treated hair friendly. Logos for cruelty-free, vegan, and a QR code are visible. A comparison image showing the back of a person’s head with curly hair; the left side labeled “Before” appears frizzy, while the right side labeled “After” looks smoother and more defined. Text above reads: Gently cleanses & defines curls, coils and waves. Three sections show: whipped shea butter, chunks of cocoa seed butter, and clear drops of glycerine, each with text describing their hair benefits—softening, protecting, creating a barrier, and sealing in moisture.
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A green Ethique Curl-Defining Solid Shampoo Bar, partially covered in white suds, sits beside its turquoise and white packaging labeled “Curl-Defining Solid Shampoo Bar, Professor Curl, 80 uses, 110g.”.

Ethique Professor Curl Shampoo Bar

3.88 oz

Why we love it

  • Free from 3,000+ banned ingredients and meets our EU-informed standards.
  • Designed specifically for curly hair, leaving it soft and well-defined.
  • Free from sulfates, silicones, waxes, and drying alcohols for healthier hair.
  • Highly concentrated formula with 10x more active ingredients than liquid brands.
Purchase options

Professor Curl Shampoo Bar $16.00

Free carbon neutral shipping on orders $29+. Arrives in 3–5 days. Free, easy 30-day returns.

Specially formulated in line with curl care principles, Ethique's Professor Curl Shampoo Bar gently cleanses without drying out your curls. Made with a nourishing blend of ingredients like shea butter, betaine, and cocoa butter with a fresh lemongrass scent. Professor Curl will help promote soft hair and defined curls. You won’t find any sulfates, silicones, waxes, or drying alcohols in this dreamy little bar. 

10x more active ingredients!
Ethique shampoo and conditioner bars have 10x more active ingredients than liquid haircare brands. Chemist designed and formulated with scientifically proven ingredients for specific hair types ands needs.

Never used a shampoo bar before?
It’s easy! Wet the bar and your hair, then directly massage the bar into your scalp. Set the bar down and massage your scalp with your fingers to achieve a nice cleanse. Rinse out!

Sodium Cocoyl Isethionate, Stearic Acid, Sodium Cocoyl Glycinate, Theobroma Cacao (Cocoa) Seed Butter, Butyrospermum Parkii (Shea) Butter, Brassica Alcohol, Betaine, Behentrimonium Methosulfate, Sodium Isethionate, Lactic Acid, Guar Hydroxypropyltrimonium Chloride, Parfum¹, Cymbopogon Schoenanthus (Lemongrass) Oil, Benzyl Alcohol, Aqua (Water), Glycerin, Sodium Chloride, Dehydroacetic Acid, Mica, Citral², Geraniol², Linalool², Ci 77288, Ci 77891.

¹Natural Fragrance
²Component Of Essential Oils & Fragrance

Ready for an easy-to-use shampoo bar?

Wet your hair and the bar. Massage the bar into your roots throughout your scalp. Put the bar down and lather shampoo into hair. Rinse (and repeat, if needed) and follow with conditioner.

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3,000+ BANNED INGREDIENTS

Personal care with nothing to hide.

From head to toe, every product is screened for ingredient safety, material impact, and unnecessary waste — so you can feel more confident in what touches your body every day.

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Strictly screened ingredients

Including parabens, PEGs, sulfates, phthalates, and synthetic fragrance

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Every personal care brand we offer is committed to cruelty-free practices

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Refillable and reduced-plastic options that lessen waste and microplastic exposure

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Go Beyond Plastic™ and microplastics.

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Grove Co. is on a mission to reduce plastic in home essentials — for both people and for the planet.

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