Wavy Genius Weft hair extension with a loose natural S-wave, Bubbles & Angels
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Straight Genius Wefts

$400.00 USD

Our flattest weft construction in the Straight texture, salon-installed, for wearers who want real density from an ultra-thin seam. Sold by the weft.

Nothing pressing against the scalp
No thick machine seam or bulky track
Cut to any width without unravelling
No acid bath or silicone coating
Can be toned or lightened
Length 18"

Longer lengths need more hair so the ends look as full as the roots.

Shade Natural Virgin Black

Both shades are raw and never dyed; a stylist can tone or lift them.
How much hair do I need?Sold by the weft. Most clients order two.

One weft is approximately 50 g, about a third of a head of hair. Set the quantity to the number of wefts you need.

  • 1 weft About 50 gA partial install, a top-up between appointments, or added density only.
  • 2 wefts About 100 gThe standard full install for fine to medium hair.Most ordered
  • 3 wefts About 150 gThick or coarse hair, a big change in length, or maximum density.

Not sure? Send three daylight photos of your hair, front, back and ends, and we will confirm the amount before you buy. Send your photosRead the full guide
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Delivery and returns
  • Made to order; processing starts immediately, so orders cannot be changed or cancelled. Ships in 1–3 business days.
  • Free Standard shipping on US orders of $300 or more; other rates are shown at checkout.
  • 7 days from delivery to request a return or store credit; original ties intact, hair unaltered.
  • Shipping and return policies

A weft is a strip of hair joined along one seam. On a Genius Weft that seam is finished by hand. There is no bulky track and no thick machine seam, so there is nothing to press against the scalp.

The hair is raw, which means it has never been dyed or chemically treated, and each weft comes from a single donor. No acid bath, no silicone coating, no synthetic fibers. Because nothing has been done to it, a stylist can tone or lighten it if your match needs refining.

On the head, the difference is comfort, and the fit is individualized. Your stylist cuts each weft to the width your head calls for and the cut edge does not unravel, so the weft is sized to you rather than the other way around. Our East Islip salon has been installing extensions since 2011; if anything here is unclear, ask us before you order.

At a glance

Method
Genius Weft, hand-finished, 0.8 mm seam
Install
Beads and thread by a licensed stylist
Hair
Raw single-donor hair, cuticle intact
Pattern
Straight
Per weft
About 50 g, roughly a third of a head
Lengths
18", 20", 22"
Shades
Natural Virgin Black, Soft Brown (both raw)
Wear
6–12 months through multiple move-ups
Shade & texture
  • Natural Virgin Black — the raw donor shade, never dyed. Reads as a deep natural black to off-black.
  • Soft Brown — naturally lighter brown donor hair, never dyed.

The texture is Straight. Wear it as it comes, or style it with heat and a heat protectant the way you would your own hair.

Exact tone varies slightly from donor to donor; that variation is what makes the hair read as your own rather than as a set.
Care
  • Wash with a sulfate-free shampoo and follow with a hydrating mask.
  • Wash in a downward direction, from the seam toward the ends.
  • Air-dry where possible.
  • Use a heat protectant every time you style with heat.
  • Braid or wrap the hair before bed.

Not sure what to order? Send us photos of your natural hair, front, back and ends in daylight, and our extension specialists will confirm your length, texture and amount before you buy. Send your photos

Guides: How much hair do I need? · One Donor, One Character · Shade and texture · Care guide · FAQ
Inside the Genius Weft
Why Bubbles & Angels

Inside the Genius Weft

The construction is the point. Here is what happens at the seam, in the hair and on the head over the months you wear it.

0.8 mm at the seam

The seam measures 0.8 mm thick and 1.7 mm tall, which makes this the flattest weft construction we offer.

Cuticle intact and aligned

Every strand keeps its cuticle intact, and all of them run in one direction.

Beads and thread install

A licensed stylist sews the weft in using beads and thread. Professional installation is required; this is not a set to put in at home.

Move-ups, not replacements

As your hair grows, the same weft is moved up and reinstalled rather than replaced, and it can be moved up multiple times. With proper care, expect 6–12 months of wear.