TRUEST
TRUEST by S FREE Acid Heat Treatment Hair Mask Premium, 180g
TRUEST by S FREE Acid Heat Treatment Hair Mask Premium, 180g
Rated 5.2 out of 7.0 by Japan’s largest beauty community
Experience salon-quality acid heat treatment at home!
✓ 100% AUTHENTIC, SHIPS FROM JAPAN
✓ DUTIES & TAXES INCLUDED FOR US ORDERS
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What it is
This premium acid-heat TR hair mask contains more repair keratin for even more power. Its denser texture intensively repairs highly damaged hair, leaving it smooth and shiny, just like you've just left the salon. It has a gorgeous, translucent white freesia scent.
Ingredients
Water, stearyl alcohol, glycerin, dimethicone, behentrimonium chloride, caprylic/capric triglyceride, levulinic acid, hydrolyzed keratin (cashmere goat), hydrolyzed silk, silk, hydrolyzed keratin, gamma-docosalactone, opuntia streptacantha extract, haberlea rhodopensis leaf extract, hematin, ceramide 2, ceramide 5, ceramide 3, ceramide 6II, ceramide 1, beet root extract, yeast extract, mandarin orange peel extract Olive Leaf Extract, Melissa Officinalis Leaf Extract, Wild Thyme Extract, Cholesterol, Hydroxyethylcellulose, Polyglyceryl-10 Distearate, Dimer Dilinoleyl Dimer Dilinoleate, Palmitamidopropyltrimonium Chloride, Propylene Glycol, Butylene Glycol, Quaternium-33, Isopropanol, PPG-3 Caprylyl Ether, Distearyldimonium Chloride, 1,2-Hexanediol, Caprylyl Glycol, Alcohol, Phenoxyethanol, Fragrance
How to use
After shampooing, lightly drain the water and apply an appropriate amount to your hair. Leave for 2-3 minutes, then rinse thoroughly to ensure no residue remains. After towel drying, blow dry your hair with a hairdryer while combing through your fingers. For damaged hair, it is more effective when used after a treatment.
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.