8 the Thalasso
8 The Thalasso Smooth Repair & Aqua Serum Hair Treatment Refill
8 The Thalasso Smooth Repair & Aqua Serum Hair Treatment Refill
@cosme rating: 4.9/7.0
A moisturizing beauty serum treatment that leaves your hair smooth and silky all the way to the ends.
✓ 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
This serum treatment is formulated with a "Thalasso Stem Cell Formula" that contains three types of stem cell extracts and seaweed extract. It delivers moisture to damaged, thin hair, binding and retaining it, leaving it smooth and manageable all the way to the ends. This serum-infused treatment repairs and repairs hollows and peeling cuticles caused by damage. It delivers nutrients to the inside of the hair, smoothing the surface and leaving it silky smooth all the way to the ends. It has a fruity floral scent.
Ingredients
Water, stearyl alcohol, behentrimonium chloride, dimethicone, cetyl alcohol, cyclopentasiloxane, cetearyl alcohol, cetearyl glucoside, stearamidopropyl dimethylamine, isopentyldiol, pulkenetia volubilis seed oil, apple fruit cell culture extract, Porphyra yezoensis extract, soluble collagen, seawater, hydrolyzed keratin (cashmere goat), hydrolyzed wool cuticle protein, sodium lauroyl hydrolyzed silk, ceramide NP, ceramide NG, ceramide AP, squalane, bisethoxydiglycol cyclohexane-1,4-dicarboxylate, crithmum maritimum callus culture filtrate , Chitosan Succinamide, Kagerou Extract, Eryngium Maritimum Callus Culture Filtrate, Algae Extract, Sodium Alginate, Biscetearyl Amodimethicone, Ceteareth-7, Ceteareth-25, Dialkyl (C12-18) Dimonium Chloride, Butylene Glycol, Polyquaternium-7, Glycerin, Ceteth-15, Hydroxyethylcellulose, Cholesterol, Quaternium-33, Amodimethicone, Lecithin, Isopropanol, Xanthan Gum, Phytic Acid, Arginine, Lactic Acid, Pentasodium Pentetate, Silver Oxide, Sodium Benzoate, Phenoxyethanol, Fragrance
How to use
After shampooing, lightly remove excess water, take an appropriate amount in your palm, spread it evenly, and apply it to your entire hair. Then rinse thoroughly.
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.
I found a cheap trial size at a recycle shop, so I bought one. My scalp odor and greasiness disappeared after using it. My hair is now smooth. I'd been using olefin-based shampoos, which had me concerned about the oiliness and odor of my scalp, but this is an amino acid-based shampoo, so it's improved the situation. I have thin hair that gets tangled no matter what shampoo I use, and it still gets tangled with this shampoo. I guess it's just my hair type.
[Testing 200 Shampoos] No. 120 Thank you so much for always reading! Following me encourages me to post more ★ 20s Hair type: Thick/Strong and bouncy, semi-long/Bleached hair (2-3 times) It has a fruity floral scent that is gorgeous and soothing, and I think many people will like it. It lathers well, isn't harsh, and has good cleansing power, so I was very impressed. It leaves my hair smooth and shiny, and I think I understand why it's so popular. It's a shampoo that's not too strong in a good way, and everyone will love it!
It makes my hair shiny. It smells great and is an easy-to-use product!
It's moisturizing and smells good!
The scent was a lovely floral scent that wasn't too sweet, but my hair was so dry that it still felt dry.