The Complete Human Hair Glossary: 40 Terms Every Buyer Should Know
Shopping for human hair gets overwhelming fast — especially the first time. Brands toss around words like virgin, Remy, lace front, HD lace, density, and bundles, and most buyers only half-know what they mean. Learn the vocabulary and you can shop on real quality instead of marketing, and pick hair that actually suits your style, budget, and routine. This glossary walks through 40 terms worth knowing before you buy a wig, bundle, extension, or any other human-hair product.
01 Hair Types & Quality
Where the hair comes from and how "pure" it is — the foundation of price and longevity.
1 Human Hair
Human hair comes from real donors, not plastic fibers. With the right care you can wash, curl, straighten, and even color it — things synthetic hair usually can't handle.
2 Virgin Hair
Virgin hair has never been touched by bleach, dye, or a perm. Left in its natural state, it tends to stay softer and last longer than processed hair.
3 Raw Hair
Raw hair is collected straight from a single donor with almost no processing, so its natural wave, curl, or coil stays intact. That untouched quality is exactly why buyers prize it.
4 Remy Hair
Remy hair is gathered so all the cuticles run the same way, root to tip. That alignment is what keeps it from matting and gives it that smooth, tangle-resistant feel.
5 Cuticles
Cuticles are the thin protective outer layer on every strand — like shingles on a roof. Keep them intact and facing the same direction and the hair stays smoother and behaves more like your own.
6 Cuticle-Aligned Hair
Cuticle-aligned simply means the strands are all oriented root-to-tip in the same direction. Do that and you get softer hair, better movement, and a longer lifespan.
02 Bundles & Wefts
The loose hair form used for sew-ins, custom units, and adding length or volume.
7 Hair Bundle
A bundle is a wefted track of hair sewn together at the top. Stylists use them for sew-ins, wig making, and custom units.
8 Weft
The weft is that stitched strip at the top of a bundle that holds the hairs together. You'll mainly see two kinds: machine wefts and hand-tied wefts.
9 Machine Weft
Machine wefts are sewn by machine, which makes them thicker and tougher — a go-to for sew-in installs that need to hold up.
10 Hand-Tied Weft
Hand-tied wefts are, as the name says, tied by hand. They're thinner and lie flatter against the head, so the install looks more seamless.
03 Wig Construction & Lace
How the cap is built and how the hairline is made to disappear — the biggest driver of realism.
11 Lace Wig
A lace wig builds the cap (at least the front, sometimes all of it) from lace, which tricks the eye into seeing a real scalp where the hair meets the skin.
12 Lace Front Wig
Lace front wigs put lace only across the hairline. You get a natural-looking front, while the rest of the cap stays more structured and secure.
13 Full Lace Wig
Full lace means lace covers the entire cap. That opens up nearly any part, ponytail, or updo you can think of.
14 13x4 Lace Wig
The "13x4" is the lace size: about 13 inches ear-to-ear and 4 inches back from the forehead. Enough room for a natural hairline and a modest part.
15 13x6 Lace Wig
A 13x6 gives you the same 13-inch width but 6 inches of depth, so you can part it further back and style more freely than a 13x4.
16 HD Lace
HD lace is ultra-thin and light, made to disappear into the scalp. It's the one people reach for when they want a hairline that's basically invisible.
17 Transparent Lace
Transparent lace starts colorless so it can be tinted to suit different skin tones. Most wearers customize it with lace tint to blend it in.
18 Lace Tinting
Lace tinting is just coloring the lace to match your skin. A quick step that takes a wig from "obvious" to "is that even a wig?"
19 Bleached Knots
Bleached knots are the little knots holding hairs to the lace, lightened so they vanish against your scalp. The result: hair that looks like it's growing right out of your head.
30 Closure
A closure is a small lace piece that covers the top of a style, giving you a natural part without building a full lace cap.
31 Frontal
A frontal is the bigger sibling of a closure — a lace piece that spans ear to ear across the front. More coverage means more styling options.
32 Wig Cap
The wig cap is the base everything attaches to, and it decides how the wig fits and sits on your head.
33 Glueless Wig
Glueless wigs stay put with straps, combs, or elastic bands — no adhesive required. Great if you'd rather skip the glue routine.
04 Hair Characteristics
The specs that decide how the hair looks, feels, and wears — length, texture, density, and more.
20 Hair Density
Density is how much hair is packed onto a unit, usually shown as a percentage:
- 130%
- 150%
- 180%
- 200%
21 Hair Length
Length runs from the root to the tip. Just remember that curls and waves shrink, so a "20-inch" curly wig won't hang as long as a straight one.
22 Hair Texture
Texture is the pattern and feel of the hair:
- Straight
- Body wave
- Deep wave
- Curly
- Kinky curly
- Afro kinky
23 Hair Pattern
Pattern is the actual shape of the strand — waves, curls, or tight coils. Texture is the broader feel; pattern is the specific shape.
24 Double Drawn Hair
Double drawn means the shorter strands have been culled out, so almost every hair is the same length. You get that thick, even look from top to bottom.
25 Single Drawn Hair
Single drawn keeps strands of mixed lengths, which reads as more natural and layered — less uniform than double drawn.
28 Hair Porosity
Porosity is how readily the hair takes in and holds moisture. Knowing yours helps you pick the right shampoos, masks, and oils.
29 Bleached Hair
Bleached hair has been lightened to strip out its natural pigment. Gorgeous colors are possible, but plan on a little extra TLC to keep it healthy.
34 Wig Density
Wig density is simply how full the hair is on the cap. What's "right" comes down to your taste and the look you're after.
05 Care & Condition
What happens after you buy — the habits that keep hair looking good and lasting.
26 Shedding
Shedding is hairs loosening from the unit over time. A little is normal; clumps coming out usually point to weak construction.
27 Tangling
Tangling is strands knotting together. Dryness, friction, and skimping on maintenance all make it worse.
39 Heat Styling
Heat styling covers flat irons, curling wands, and blow dryers. Human hair takes heat better than synthetic, but a heat protectant is still smart.
40 Hair Maintenance
Maintenance is everything you do to keep the hair alive longer: washing, conditioning, detangling, proper storage, and protection from damage.
06 Customization & Protective Styling
The finishing touches and wear styles that protect your natural hair and sell the realism.
35 Protective Style
A protective style tucks your natural hair away and limits daily handling — think wigs, braids, twists, extensions. Less manipulation, less breakage.
36 Custom Wig
A custom wig is built to your specs: size, texture, color, hairline — the works. You're not fitting yourself to the wig; the wig fits you.
37 Baby Hair
Baby hairs are the fine little strands styled along the hairline to soften the edge and sell the "this is my real hair" look.
38 Pre-Plucked Hairline
A pre-plucked hairline has had some hairs thinned out near the front so it doesn't look like a hard, drawn-on line. Softer, more believable.