COSME DECORTE
COSME DECORTE AQ Boosting Treatment Hair Serum Refill, 200ml
COSME DECORTE AQ Boosting Treatment Hair Serum Refill, 200ml
@cosme rating: 5.5/7.0
The answer is to use an "introductory beauty serum" for your hair.
✓ 100% authentic
✓ Ships from Japan in 3-5 days
✓ Duties prepaid for US orders
✓ Tracked delivery via Japan Post
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What it is
The answer to the "introductory serum" for your hair. This hair serum was born from the wisdom of dermatological research, penetrating and repairing the hair core. Penetrating and repairing the hair core, it leaves your hair smooth and manageable all the way to the ends. This water-based hair serum is used as an introductory serum before a treatment. This special care treatment hair serum penetrates the interior of damaged hair with luxurious moisture, repairing damage caused by dryness, coloring, friction, and more. It leaves your hair moisturized and manageable all the way to the ends, leaving it high-quality, smooth and manageable. *This product is a replacement, so the pump is not included.
Ingredients
Water, glycerin, diglycerin, ethanol, butylene glycol, propylene glycol, tripropylene glycol, steartrimonium chloride, rosa canina fruit extract, cassia root extract, birch sap, birch bark extract, sandalwood extract, polyquaternium-51, morus alba root bark extract, moso bamboo shoot bark extract, moringa oleifera seed oil, hydrolyzed soy protein, sodium alginate, PEG-50 hydrogenated castor oil isostearate, isopropanol, succinic acid, disodium succinate, diglucosyl gallate, dicocoyl ethyl hydroxyethylmonium methosulfate, soybean sterols, palmitic acid, phosphorylcholine glycol polyacrylate, phenoxyethanol, methylparaben, fragrance
How to use
Use approximately 2-3 times a week. After shampooing, lightly drain and apply 1-2 pumps directly to damaged areas, blending in. (For semi-long hair, 4 pumps is recommended. If damage is a concern, apply more depending on the condition of your hair.) Leave on for approximately 10 seconds, then apply your usual conditioner or treatment without rinsing. Rinse afterwards. *If you are finishing with this product, rinse without applying conditioner or treatment. <Refilling Instructions> Always replace the pump with the Cosme Decorte AQ Boosting Treatment Hair Serum. ◇To prevent the introduction of germs, do not wash the pump before replacing. After washing, dry it thoroughly. ◇Do not transfer any remaining contents from the previous container into this product. Do not mix with water or other products. ◇For hygienic use, we recommend purchasing a new bottle after approximately 3 uses.
We ship internationally from Japan!
Frequently Asked Questions
Is this authentic?
Yes. We only buy from official retailers and directly from the brands here in Japan. Never resellers, never grey market stock.
We are beauty lovers too, so we know the worry, especially with something you are putting on your face. Authenticity is 100% guaranteed by us.
What are your shipping rates?
On orders under US$75, shipping is a flat US$20 to the United States and US$10 to all other countries.
Orders of US$75 or more ship free, applied automatically at checkout. Your exact shipping cost is shown before you pay.
How long does delivery take?
These estimates are for International Airmail (Tracked) and include 3 to 5 business days of processing in Japan.
- United States: 12 to 15 business days
- Canada, United Kingdom, France, Germany: 9 to 12 business days
- Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 business days
- China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 business days
- Rest of the world: 11 to 18 business days
Actual delivery can be affected by customs clearance, seasonal congestion, or carrier delays in the destination country, all of which are outside our control.
Do you offer express shipping?
Yes. As of 22 July 2026, we offer International Express Mail through Japan Post. The cost is based on order weight and is calculated automatically at checkout.
Will I pay customs or import fees?
US orders: No. As of July 1, 2026, all US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.
Orders outside the US: Possibly. Duties and import taxes are set by your local customs authority and are not collected at checkout, so any charges on delivery are your responsibility.
We're working on rolling out prepaid duties for more countries soon.