Hair serums with the weight printed on the bottleFree shipping over $45All prices in USD
Northline

The Fine Hair Week

Everything at weight 1 or under. Nothing that can flatten you

Top weight in this box

Tops out at 1 of 5

A routine states the heaviest thing in it rather than a single per-application number, because the products in it are used on different days and in a set order. That order is under “How to use” below.

$84.00

USD
1

Free standard shipping. Arrives in 3–5 business days. 45-day returns.

What is in this routine

Bought separately$98.00
As a routine$84.00

The whole routine for fine and thin hair, and every item in it is weight 1 or under. No oil, no butter, no leave-in mask — nothing in this box can put your hair flat, which is the only thing that actually matters when hair is fine.

Wash with CL-01, condition from the ears down with CN-01, SR-01 on the mid-lengths while damp, ST-01 before any hot tool. That is the entire routine, and there is not a fifth step missing.

Highest weight in the box: 1.

The ingredient record

Everything in this formula, stated plainly, and the reasoning behind the number on the bottle. The same record is printed on the insert in the box.

Frequency
A complete week
Ingredients (INCI)
Contains Daily Wash (CL-01, 250 ml), Daily Conditioner (CN-01, 250 ml), Weightless Smoothing Serum (SR-01, 50 ml) and Heat Shield Spray (ST-01, 150 ml). Full ingredient lists on each product page.
Size
Four full-size products. 700 ml total.
Net weight
733 g
Texture
See each product.
Made
Formulated and filled in the United States.

How to use

  • CL-01 on the scalp, rinse.
  • CN-01 from the ears down, one minute, rinse.
  • SR-01 on damp mid-lengths and ends.
  • ST-01 before any hot tool.

Cautions

  • Contains hydrolysed wheat protein in ST-01. Avoid with a wheat allergy.
  • If your hair is coarse or curly, this box is built for the opposite problem — The Curl Week is the right one.

Shipping

$4.95 standard, free over $45. 3–5 business days. Full policy

45 DAYS

Returns

Unopened and in original packaging, or opened if it caused a reaction. Refunded within 5 business days of reaching us. Full policy

Questions about this product

hello@northlinehair.comEvery message answered within one business day.

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