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#5 The Mask
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Not recommended for your sensitivity
The StoryPurified, polished perfection. A sophisticated gel formulation, #5 The Mask is designed to restore the skin’s inherent clarity.
Why Dr. Baumann carries this
Written for this product
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Approved for Baumann Skin Types
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Approved for all 16 Baumann Skin Types, except the Allergic sensitive subtype. Dr. Baumann reviews every product against all 16 types before it goes on the site.
What it is and what it does
The Story
Purified, polished perfection.
A sophisticated gel formulation, #5 The Mask is designed to restore the skin’s inherent clarity. This weekly treatment harnesses a powerful yet gentle complex of organic acids to recalibrate skin’s pH and refine texture. As hydration is delivered, a picture of unbridled radiance is revealed.
The Promise
• Masterfully purifies the skin
• Recalibrates skin pH to a youthful, acidic level
• Instantly reveals a brighter, more radiant complexion
• Elicits a supremely soft, supple texture
• Skin is left nourished, hydrated, and radiant
The Ritual
Apply a generous layer to clean, dry skin. Allow the mask to infuse for 20 minutes, then rinse thoroughly with tepid water.
Gently pat dry and follow with your recommended RATIONALE Essential Six formulations. Perform once weekly for remarkable skin luminosity.
The Research
Clear, radiant skin is intrinsically connected to the health of the skin’s microbiome. This complex ecosystem is influenced by various factors—including its acidic pH, vital enzyme function, moisture reserves, and signaling proteins—which is why maintaining a healthy acidic balance is essential.
To optimize the skin’s immune defense systems, desirable bacterial colonies must be evenly distributed and active. Changes to the epidermal ecosystem caused by changes to skin pH or compromised barrier function, may result in an accumulation of pathogenic Colony Forming Units (CFUs) inside pores. This may lead to clogged pores, breakouts, increased sebaceous output and a rough, dry, sensitive texture.
RATIONALE Research has identified and combined two potent yet calming actives – Salicylic Acid and Piroctone Olamine that help to restore optimal CFUs, controlling congestion and breakouts.
In addition, an imbalanced pH impairs the function of enzymes, lipid synthesis and cellular turnover, while depleting our skin of essential structural proteins. These effects are further accelerated following exposure to pollution and solar damage. All of these vital cellular processes are restored when skin pH is recalibrated back to youthful, acidic levels, restoring a radiant, purified complexion.
Who it is for
Approved for all 16 Baumann Skin Types, except the Allergic sensitive subtype.
Key ingredients

Exfoliating alpha hydroxy acid to renew and smooth skin

Anti redness exfoliant that gets thru skin oil to remove blackheads. Calms acne and rosacea. Loved by oily skin types.

Soothing antiaging ingredient that gives cells energy. Help prevent recurrence of dark spots and unwanted skin pigment.

Attracts water, giving cells and skin volume. Plays a key role in cell signals and other vital processes. It cushions the skin, providing resilience and firmness. This moisturizing humectant temporarily plumps fine lines and wrinkles. HA makes skin feel dewy and look radiant and glowing. Great for oily skin because it feels lightweight and non-greasy on the skin. Safe for all skin types. HA helps other skincare products get into the skin. This antiaging and hydrating ingredient can radically alter how your skin routine works by affecting penetration and absorption of other ingredients- so make sure you use it in the correct step of your skin care routine.

Glycerin (Glycerol) is the best natural moisturizing ingredient to hydrate skin quickly. May give products a sticky feel.
Full ingredient list
Product type and skin type data
| Brand | Rationale |
|---|---|
| Product type | Facial Mask |
| Size | 1.7 oz. |
| Item number | RAT-CM |
| Approved Baumann Skin Types | ORPT, ORNT, ORPW, ORNW, DRPT, DRNT, DRPW, DRNW, DSPT, DSNT, DSPW, DSNW, OSPT, OSNT, OSPW, OSNW |
| Recommended for these sensitivities | Acne, Redness, Stinging |
Frequently bought together
Dr. Baumann pairs these together.
Reviews
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