OUAI Medium Shampoo Refill - Hydrating Shampoo for Medium Hair

In this review the OUAI Medium Shampoo Refill is evaluated as a targeted option for people with medium-thickness hair who want a nourishing, sulfate-free daily wash. The bottom line: it cleans without stripping, adds lightweight hydration and helps reduce breakage thanks to coconut oil and babassu oil, while hydrolyzed keratin and kumquat extract improve shine and control flyaways. For anyone who needs a routine-friendly, refillable hydrating shampoo that leans reparative rather than clarifying, this refill format delivers good value and predictable results.

Key Features

• Sulfate-free formula: cleans medium strands while preserving natural oils so hair does not feel overly stripped after each wash.
• Babassu oil: provides weightless hydration to the hair and scalp, reducing dryness without weighing hair down.
• Coconut oil: helps seal split ends and strengthen strands to reduce breakage during styling and brushing.
• Hydrolyzed keratin: smooths the hair surface and reduces frizz and flyaways for a sleeker appearance.
• Kumquat fruit extract: adds a reflective finish that improves shine without leaving residue.
• Refill format: supplies an economical, larger volume option to keep a consistent routine with less packaging turnover.

Who It's For

The refill is best for people with natural or dyed medium-thickness hair who want a gentle, hydrating shampoo that supports daily styling and reduces breakage. It suits users who prefer a more restorative wash rather than deep cleansing, and those looking to maintain shine and softness without heavy silicones.

Those with very fine hair seeking maximum volume or people with very oily scalps who need strong degreasing may want a clarifying formula instead. If extreme repair for severely damaged or chemically compromised hair is needed, a concentrated treatment system would be a better complement.

Pros & Cons

Pros

• Moisturizes medium strands without heavy residue, leaving hair soft and manageable.
• Improves shine and reduces flyaways thanks to hydrolyzed keratin and kumquat extract.
• Refill size offers cost efficiency and consistent supply for an established routine.
• Customers report a pleasant scent and noticeable improvement in hair quality and volume.

Cons

• Some shoppers find the refill pricey compared with budget shampoos despite the larger size.
• Not formulated for intense clarifying or for very oily scalps that need stronger detergents.

Specifications

Product type	Hydrating shampoo refill
Hair type	Medium strands
Key oils	Babassu oil, Coconut oil
Active smoothing ingredient	Hydrolyzed keratin
Shine booster	Kumquat fruit extract
Formulation highlights	Sulfate-free, paraben-free, phthalate-free
Size	32 Fl Oz refill

Our Verdict

The OUAI Medium Shampoo Refill is a solid pick for anyone with medium hair seeking a gentle, hydrating daily cleanser that improves softness and shine while helping to reduce breakage. It represents good value for a refill format if you favor routine simplicity and a sulfate-free approach, though those needing heavy-duty clarifying may prefer a different product.

Frequently Asked Questions

Is this shampoo suitable for color-treated hair?
Yes, the sulfate-free formula is generally safe for color-treated medium hair and helps maintain moisture and shine.

Will it weigh down fine hair?
It is formulated for medium strands and provides weightless hydration, but very fine hair may find it slightly less volumizing than clarifying shampoos.

How should it be used with conditioner?
Wet hair, lather and rinse, then follow with OUAI Medium Conditioner for best hydration and manageability.