KOSI Multi-Acid Mask

Name: Kosi Multi-Acid Mask
Brand: Holifrog
SKU: HFG1200
Price: 64.00 USD
Availability: OutOfStock

The situation: Fatigued.

active-tolerant skin · texture · congested skin | weekly reset · blemishes · dull skin

Your weekly skin reset. 10 minutes. Deeper results than a nightly serum alone.

$64.00

Free shipping on orders $75+

A concentrated multi-acid mask for weekly resurfacing. Kosi is glycolic-free by design, making it the most accessible resurfacing mask in the line for sensitive skin and darker skin tones. With a potent combination 10% AHA Blend, 2% Salicylic Acid, and 8% PHA, Kosi visibly smooths skin and refines the complexion while balancing skin's barrier for improved clarity, brightness & softness.

What it feels like

Slight tingling on application is expected and normal. Mild temporary redness may occur. The mask absorbs quickly and rinses clean. Skin feels noticeably smoother immediately after rinsing.

Top benefits

— Glycolic-free by design: most accessible resurfacing mask for sensitive skin and darker skin tones
— 10% AHA + 2% Salicylic Acid resurface texture and help address blemish-related congestion
— Chlamydomonas Reinhardtii (AcquaSeal® Algae): helps renew and hydrate skin, rare at retail
— 8% PHA (Gluconolactone): hydrates as it refines, so the barrier isn't compromised while the stronger acids work

Water (Aqua) (Eau), Gluconolactone, Prunus Persica (Peach) Kernel Oil, Lactic Acid, Glycerin, Isoamyl Laurate, Simmondsia Chinensis (Jojoba) Seed Oil, Bentonite, Malic Acid, Cetearyl Olivate, Salicylic Acid, Sorbitan Olivate, Undaria Pinnatifida Cell Culture Extract, Mandelic Acid, Chlamydomonas Reinhardtii Extract, Helianthus Annuus (Sunflower) Seed Oil, Disodium Acetyl Glucosamine Phosphate, Magnesium Chloride, Melia Azadirachta Flower Extract, Curcuma Longa (Turmeric) Root Extract, Ginkgo Biloba Leaf Extract, Avena Sativa (Oat) Kernel Extract, Isoamyl Cocoate, Lysolecithin, Silica, Sclerotium Gum, Potassium Sorbate, Xanthan Gum, Pullulan, Leuconostoc/Radish Root Ferment Filtrate, Sodium Hydroxide

PM (up to twice a week): Apply an even layer to clean, dry skin and leave on for 10–20 minutes. Rinse thoroughly with warm water, then follow with Galilee and Grand. For best results, use up to twice a week.

PM Routine (Kosi nights): Kissimmee → Superior or Tashmoo → Kosi → Galilee → Owel → Grand → Caspian

Do not use Shasta or Halo in the same routine as Kosi.

Pore Confession: On Kosi nights, skip Halo. On non-Kosi nights, Halo maintains the resurfacing work between treatments. They don't stack — they alternate.

Slight tingling and/or mild redness upon application may be experienced and is normal. If your skin is prone to sensitivity, this mask may not be the right product for you. We suggest a patch test prior to use to check that your skin will tolerate the mask—apply to a small area of skin and wait up to 90 seconds to ensure your skin tolerates the high acid content of this product.

Warning: For external use only. Avoid contact with eyes.
Sunburn Alert: Contains AHA. Use SPF daily and limit sun exposure.

Skin noticeably smoother and softer.

A good skincare routine requires dedication (that's on you) – With consistent weekly use, skin appears visibly smoother and more refined.

Build Your Skin Strategy

Kosi is your weekly treatment, not your nightly one. Build your routine around it: 1x or 2x per week for deep reset, Halo on the nights in between for maintenance, Superior or Tashmoo as your daily cleanse to support the work.

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Exfoliating AHA + BHA Night Serum

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Tashmoo Amino Hydrating Milky Cleanser

Amino Hydrating Milky Cleanser

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Fragrance Free

Cruelty Free

Nourishing

Non Drying

Non-Foaming

Kosi Multi-Acid Mask

$64.00

Understanding Chemical Exfoliants

AHAs (Alpha Hydroxy Acids) and BHAs (Beta Hydroxy Acids) are chemical exfoliants that can offer significant benefits to the skin when combined in a single product. AHAs, are water-soluble and work on the surface to improve skin texture and tone, while oli-soluble BHAs work deeper within the skin to unclog pores and tackle acne-related concerns. By incorporating both AHAs and BHAs in one formula, you can achieve comprehensive exfoliation and address multiple skin concerns simultaneously. This combination can provide smoother skin, reduced breakouts, improved skin tone, and a brighter-looking complexion.

Our key ingredients

10% AHA Blend

(Lactic, Mandelic & Malic Acids)

Powerful alpha hydroxy acids, these chemical exfoliants have smaller-sized, water-soluble molecules that work on the surface to dissolve buildup and refine uneven texture for improved brightness and clarity.
2% BHA

(Salicylic Acid)
Potent beta hydroxy acid, this oil-soluble chemical exfoliant penetrates pores to help decongest them from excess sebum and buildup that may cause blemishes and an enlarged appearance.
8% PHA

(Gluconolactone)
Similar in benefit to AHAs but gentler on sensitive skin types due to its ability to simultaneously hydrate skin as it refines and brightens.
AcquaSeal® Algae

Derived from a green algae that can thrive in extreme environments, this oil-soluble active produces a bioactive complex of lipids and fatty acids that helps support the appearance of renewed, hydrated skin and soothing properties.