100% Human Hair · Ethically Sourced
Genius Weft Straight
Genius Weft Straight
An ultra-thin weft that lies flat, cuts anywhere, and disappears into the client's own hair.
-
1 Jet Black
-
1C Cool Soft Black
-
2 Darkest Brunette
-
3 Darkest Warm Brunette
-
5 Medium Warm Brunette
-
6 Cool Medium Brunette
-
7 Rooted Golden Brunette
-
8 Rooted Brunette (highlights)
-
10 Rooted Light Brunette
-
13 Rooted Brunette (Golden Highlights)
-
14 Warm Dimensional Brunette Balayage
-
15 Rooted Dimensional Brunette
-
16 Natural Copper (Level 7)
-
20 Rooted Dimensional Dark Golden Blonde
-
22 Rooted Dimensional Low lighted Warm Brunette/Blonde
-
23 Rooted Cool Dimensional Balayage
-
24 Rooted Neutral Medium Brunette Blonde Balayage
-
26 Rooted Neutral Bronde (Blended)
-
28 Short Root Dimensional Cool Blonde
-
29D Rooted Medium Dimensional Blonde
-
30 Rooted Golden Blonde
-
31 Rooted Cool Bright Blonde
-
32 Rooted Dimensional Blonde
-
34 Rooted Level 9 Blonde (warmer)
-
35 Rooted Lowlighted Blonde
-
36 Rooted Best Seller Neutral Bright Blonde
-
38 Short Root Light Blonde
-
39 Short Root Neutral Bright Blonde
-
40 Short Root Lightest Cool Blonde
-
41 Long Root Lightest Cool Blonde
-
42 Short Root Brightest Neutral Blonde
-
43 Short Root Bright Neutral to Cool Blonde
-
45 Cooler and brighter version of color 35
Compare colors
How much hair do I need?
Adding fullness (no length): one row (about 20–60 grams).
Adding length: 2–3 packs, depending on the client’s starting density — length needs roughly double the density of the natural hair for a seamless blend.
Full transformation (bob to long): 3–4 packs.
We always suggest ordering on the side of caution so you’re not left in a pinch — when in doubt, your LINEONE artist can confirm at consultation.
Be the first to know when this color is back.
Recommended substitutes
Try a close match
Prefer to wait? Close this and choose Notify Me When Available below.
✓ BLACK CARD MEMBER ACCESS
Enjoy early access to this product at 50% off until public launch.
Couldn't load pickup availability
Description
Description
Meet the Genius Weft — Where Effortless California Chic Becomes Your Signature
LINEONE Genius Weft Hair offers endless possibilities for creating stunning, natural-looking hair. Whether you’re adding fullness, length, or both, our micro genius wefts deliver a flawless result every time.
Engineered to be ultra-flat and completely customizable, each weft can be cut at any point without unraveling, allowing perfect tailoring to any head shape or style. The micro-thin design ensures the wefts lay exceptionally flat to the head for maximum comfort and invisibility.
Key features:
Flat & Customizable: Cut anywhere along the weft with confidence — no fraying, no unraveling.
Stackable & Versatile: Layer multiple wefts for added volume or a seamless color melt.
Reusable Luxury: All wefts are 20 inches long and can be reused across multiple applications with proper care.
Natural Color Blends: Each weft features rich, multi-tonal shades for an undetectable blend with natural hair.
The result? Extensions that embody California chic — effortlessly luxurious, natural-looking hair transformations with every application.
For more information on Weft Hair Applications, get certified in our Weft Masterclass!
Product Details
Product Details
LINEONE Genius Weft Hair can be used in many different types of applications to add fullness, length, or both. Our micro genius wefts are extremely flat and can be cut to a customizable size, yet they still lay extremely flat to the head.
For more information on Weft Hair Applications, get certified in our Weft Masterclass!
About this product
About this product
1 - Jet Black

Real matches
See all matches