STEPHEN KNOLL
Stephen Knoll Deep Renew Treatment Mask, 260g. Weekly rinse-out hair mask for six kinds of damage
Stephen Knoll Deep Renew Treatment Mask, 260g. Weekly rinse-out hair mask for six kinds of damage
Rated 5.1 out of 7.0 on @cosme, Japan's largest beauty review site
A rinse-out hair mask that intensively repairs six kinds of damage.
✓ 100% authentic, bought in Japan
✓ Ships from Tokyo in 3 business days
✓ Duties prepaid for US orders
✓ Tracked delivery via Japan Post
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What it is
Deep Renew Treatment Mask is a 260g rinse-out hair mask for intensive weekly repair. Its total damage care formula targets six damage factors, from color, perms, and heat to bleach, UV, and brushing, with penetrating repair capsules of amino acids, ceramides, and cholesterol, plus argan, jojoba, and camellia oils and hyaluronic acid for smooth, hydrated hair.
Why it's different
A total damage care formula targets six damage factors in one mask.
Repair capsules of amino acids, ceramides, and cholesterol penetrate to mend.
Argan, jojoba, and camellia oils plus hyaluronic acid smooth and hydrate.
Key ingredients
Amino acids, ceramides, and cholesterol: penetrate to repair damage
Argan, jojoba, and camellia oils: smooth and add shine
Hyaluronic acid: adds lasting moisture
How to use
1. After shampooing, lightly squeeze out excess water.
2. Work an appropriate amount through the hair.
3. Leave on for 2 to 3 minutes, then rinse well. Use once or twice a week.
Stephen Knoll Deep Renew Treatment Mask, 260g. Weekly rinse-out hair mask for six kinds of damage
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.
How often should I use it?
Use it as a special treatment once or twice a week, rather than as a daily conditioner, for intensive repair.
What damage does it target?
It targets six damage factors: color, perms, heat, bleach, UV, and brushing, with repair capsules and oils that smooth and mend hair.
How long do I leave it on?
Leave it on for 2 to 3 minutes after squeezing out excess water, then rinse thoroughly.
What does it smell like?
It has a sweet, aromatic floral woody fragrance.
We ship internationally from Japan!
International Delivery Rates
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 international shipping take?
These estimates are for International Airmail (Tracked) and include 3 to 5 business days of processing in Japan. As of 22 July 2026:
- 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
These are estimates only. 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. We offer International Express Mail through Japan Post. The cost is based on order weight and is calculated automatically at checkout.
Will I have to 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.
What our customers are saying
I was interested in this as a special once-a-week treatment, so I bought it! I love how it leaves my skin feeling smooth and silky after washing!
This was perfect for me, as I wanted to tame my dry, frizzy hair, which was damaged by straightening and coloring, and needed moisture. I'd been using Fino for many years, but I stopped using it because, although I'm not sure if it was true, I felt like scalp ingredients remained even after rinsing, and I've been struggling with treatments ever since. This product has been a hit for me for a long time. The texture is softer than Fino, so it seems to rinse off properly, and the scent doesn't linger, making it easy to use. My hairdresser told me that my hair would benefit from a treatment instead of a conditioner every day, and this is great because I can use it every day without any stress.
I bought the pouch version to use when traveling or on business trips, and it didn't have a strong smell and made my hair smooth and manageable, so next time I'd like to buy the jar version.
These kinds of hair masks are impressive only at first, but the impression doesn't last if you continue using them. But this mask is different. It makes my hair smooth every time I use it, so I'm impressed! The scent is also nice, like something you'd get at a beauty salon.
I bought it because I like the scent. It comes in a large container, so I plan to use it once a week.