Moist Diane
Moist Diane Perfect Beauty Extra Straight Treatment Refill (660ml)
Moist Diane Perfect Beauty Extra Straight Treatment Refill (660ml)
@cosme rating: 4.6/7.0
For soft, smooth straight hair that is moisturized 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
Organic argan oil (*1) and a unique beauty keratin formula repair damage. "Cuticle keratin (*2)" conditions the cuticle, leaving even frizzy or curly hair moisturized and fluffy straight all the way to the ends. ●Extra Straight is a series that focuses on achieving a finish that minimizes frizz and flyaways in hair●Contains organic argan oil (*1), organic sapote oil (*3), organic baobab oil (*4), organic quinoa oil (*5), organic prune oil (*6) *1 Argania spinosa kernel oil (moisturizing ingredient) *2 Lauryldimonium hydroxypropyl hydrolyzed keratin (wool), hydroxypropyltrimonium hydrolyzed keratin (repairing ingredient) *3 Pouteria sapota seed oil (moisturizing ingredient) *4 Baobab seed oil (moisturizing ingredient) *5 Quinoa seed oil (moisturizing ingredient) *6 Prune seed extract (moisturizing ingredient) *Package design may change without notice.
Ingredients
Water, cetearyl alcohol, dimethicone, gamma-docosalactone, quaternium-18, quaternium- 33, cholesterol, ceramide EOP, ceramide NG, ceramide NP, ceramide AG, ceramide AP, PG, hydrolyzed keratin (wool and feather), argania spinosa kernel oil, mangifera indica (mango) seed oil, theobroma grandiflorum (green tea) seed butter, prune seed extract, carapa guaianensis (carapa) seed oil, sclerocarya birrea (baobab) seed oil, quinoa (quinoa) seed oil, keratin (wool), poteria sapota (green tea) seed oil, lauryldimonium hydroxypropyl hydrolyzed keratin (wool), hydroxypropyltrimonium hydrolyzed keratin, terminalia ferdinandiana (green tea) fruit extract, oenocarpus bataua (green tea) fruit oil, acetylcysteine, glyoxylic acid, schindiophyton lautanenii (sunflower) kernel oil, apple (apple) fruit cell culture extract, argania spinosa (argan) blast cell extract, hydrolyzed conchiolin protein, cetearamidoethyldiethonium hydrolyzed rice protein, isostearoyl hydrolyzed Collagen, Hydrolyzed Quinoa Seed, Hydrolyzed Baobab Seed Extract, (Dihydroxymethylsilylpropoxy) Hydroxypropyl Hydrolyzed Silk, Gold, Silver, Collagen, Castor Oil, Isomalt, Propanediol, Ethylhexyl Palmitate, Soybean Sterols, Hydrogenated Castor Oil Isostearate, Glucose, Butylene Glycol, Dimethiconol, Sodium Lactate, Isostearic Acid, Sodium Lauraminopropionate, Sodium Bicarbonate, Cymen-5-ol, Hydroxyethylcellulose, Cellulose Gum, Xanthan Gum, Lecithin, Steartrimonium Chloride, Cetrimonium Chloride, Dicocodimonium Chloride, Behentrimonium Chloride, Isopropanol, Glycerin, Alcohol Denat., Ethanol, Benzyl Alcohol, Lactic Acid, Citric Acid, Tocopherol, Phenoxyethanol, Potassium Sorbate, Disodium EDTA, Sodium Benzoate, Fragrance, Caramel
How to use
(1) After shampooing, lightly squeeze out excess water from your hair. (2) Take an appropriate amount in your hand and apply it to your entire hair. (3) Leave it on for a while, then rinse thoroughly. For best results, use the entire series.
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.
It smells nice! It's neither good nor bad, but I don't wake up in the morning with an explosion of frizzy, curly hair.
I bought it because of the value for money and the cute packaging! It really does make my hair smooth!! It's also great that it's silicone-free. After applying a generous amount of conditioner (important), leave it for 5 minutes, and rinse with cold water, and you'll get an incredible shine! It also has a strong feminine scent, which is great lol. If you're someone who spends a lot of money on expensive shampoos, try the Diane series!! Seriously, it's so good lol I'll definitely be buying it again!
I absolutely love Diane's scent! It's cheap and I keep buying it.
I've been using this product for about two years, and after switching to Lux Super Rich Shine once, I finally came back. It really is a great value! For the price, it keeps my hair in place, and the treatment is available in a pump, making the texture easy to manage. My hair is curly and voluminous, so when I had it cut short, my hairdresser was concerned that a cut without straightening wouldn't work. But this product keeps the base in place, so I can wear it short without any problems.
I've just finished one bottle. I have soft, curly hair. I bought it because I was attracted by the name "Extra Straight." It didn't make my hair straight, but it did make it soft and smooth. However, because the shampoo is so moisturizing, it takes a long time to rinse out, which can cause a slight itchiness on my scalp.