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STEPHEN KNOLL

Stephen Knoll Smooth Straight Treatment, 475ml (Green Floral Bouquet)

Stephen Knoll Smooth Straight Treatment, 475ml (Green Floral Bouquet)

Rated 5.5 out of 7.0 by Japan’s largest beauty community

A smoothing treatment that tames frizz and waves for sleek, straight-looking hair.

✓ 100% authentic, ships from Japan

✓ Duties & taxes included for US orders

Regular price $46.00 USD
Regular price Sale price $46.00 USD
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What it is

Smooth Straight Treatment is a 475mL rinse-out treatment that smooths unruly, wavy hair for a sleek, straight-looking finish. It softens and coats the strands to control frizz and humidity swell, so hair falls straighter and more manageable. It leaves hair smooth and glossy with a green floral bouquet scent, and pairs with the matching shampoo.

Why it's different

Smooths wavy, frizzy hair for a sleek, straight-looking finish.
Helps control humidity swell so hair stays manageable through the day.
Leaves hair glossy in a green floral bouquet scent; pairs with the shampoo.

How to use

1. After shampooing, lightly squeeze water from the hair.
2. Work an appropriate amount through the mid-lengths and ends.
3. Leave briefly, then rinse well.

Stephen Knoll Smooth Straight Treatment, 475ml (Green Floral Bouquet)

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 does it do for the hair?

It smooths wavy, frizzy hair for a sleek, straight-looking finish, and helps control humidity swell so hair stays manageable.

Does it straighten hair permanently?

No. It is a rinse-out treatment that smooths and controls frizz for a straighter look; it does not chemically straighten the hair.

How do I use it?

After shampooing, work it through the mid-lengths and ends, leave briefly, then rinse well.

What does it smell like?

It has a green floral bouquet scent, and it pairs with the matching Smooth Straight shampoo.

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 and include 3 to 5 business days of processing in Japan.

  • United States: 12 to 15 days
  • Canada, United Kingdom, France, Germany: 9 to 12 days
  • Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 days
  • China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 days
  • Rest of the world: 11 to 18 days

Please note that 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.

Will I have to pay customs or import fees?

For US customers: All US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.

For customers outside of the US:
Unfortunately, we are unable to process prepaid custom taxes for any other countries other than the US. 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.