Types of Hair Wefts: Machine, Genius, Curtain and Fusion Extensions Explained
Extension listings use many weft names: machine weft, double weft, genius weft, hair curtain, flat tip and more. They affect how flat the extensions lie, whether they can be cut, and how they are installed. This guide explains the main types of hair wefts so you can choose with confidence.
Weft types compared
| Type | What it is | Install | Good to know |
|---|---|---|---|
| Machine weft | Hair sewn onto a strip by machine | Sew-in, wigs, quick weave | Strong and affordable; slightly thicker at the top |
| Double weft | A machine weft with two rows of stitching | Sew-in and wig making | Fuller and stronger than a single weft |
| Hair curtain | A long weft sold by length, often in natural colours | Sew-in, wig making, clip-in DIY | Flexible to cut to the length you need |
| Genius weft | A very thin, flexible weft | Sew-in or beaded rows by a stylist | Lies very flat; check the listing before cutting |
| Flat tip / fusion keratin tip | Small strands with a keratin bond | Strand-by-strand with heat, by a stylist | Natural movement; needs professional fitting and removal |
| Bulk (no weft) | Loose hair | Braiding and crochet | Section it yourself |
Which one should you choose?
- Doing a traditional sew-in or making a wig? Machine or double weft bundles, or a hair curtain.
- Want the flattest possible rows? Genius weft, installed by a stylist.
- Want strand-by-strand extensions? Flat tip keratin, fitted by a trained stylist.
- Doing braids or crochet? Bulk hair. See crochet hair for beginners.
Matching wefts with closures and frontals
Many sew-ins finish with a closure or frontal for the top or hairline. Match the texture and colour of your wefts and lace piece. Read bundles with closure vs frontal to choose.
Shop wefts and hair curtains
- Double Drawn Genius Weft Extensions – Blonde, 100g
- Natural Color Hair Curtain Extension – Straight Real Hair
- Straight Wave Human Hair Curtain Extension
- Long Length Human Hair Extensions – Straight Weave
- Natural Black Hair Extension – Body Wave, 16 to 24 Inch
- Brazilian Body Wave Human Hair Extensions
- Human Hair Body Wave Bundles – Natural and Jet Black
- Peruvian Body Wave Hair Extension – 8 and 10 Inch
- Flat Tip Keratin Hair Extensions – 50 Strands
Shop closures and frontals to match
- Straight Real Hair Bundle and Lace Closure – Black
- HD Frontal and Closure – Melt Skin Lace
- Transparent Lace Closure and Frontal – 2x6 to 13x4
- Straight HD Lace Frontal and Closure – Natural Black
See more in our hair extensions collection.
Frequently asked questions
What is the difference between a machine weft and a genius weft?
A machine weft is sewn by machine and is slightly thicker at the top. A genius weft is thinner and more flexible, so it lies flatter.
Can I cut a weft?
Many machine wefts can be folded instead of cut to avoid shedding. Check each listing before cutting genius or other specialty wefts.
Do fusion tip extensions need a stylist?
Yes. Keratin tips are bonded with heat and should be fitted and removed by a trained stylist.
How many wefts do I need?
It depends on the length and weight. See how many bundles do I need.