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Type 4B Hair

Type 4B hair bends in sharp, zig-zag angles instead of round curls, with a soft, fluffy texture and high shrinkage.

Coily · Z-pattern coils

Type 4B hair is defined less by curls and more by angles. Instead of forming round spirals, the strands bend in sharp Z-shapes, which gives 4B hair a soft, cottony look and a lot of volume. Without styling, there may be little visible pattern at all — definition usually comes from twisting, braiding or shingling.

Shrinkage is high, often 60–70% or more, so 4B hair can look much shorter than it is. Each sharp bend is a weaker point along the strand, which makes 4B hair delicate when it's dry or handled roughly. Most length struggles with 4B hair come from breakage at the ends, not slow growth.

4B hair often feels dry quickly and loves water-based moisture sealed with an oil or butter. Many people with 4B hair get the best results from low-manipulation styles that keep the ends tucked away, and from detangling only when the hair is saturated with conditioner.

Take the quiz Test your porosity →

Hair type alone doesn’t decide your routine. Porosity, density and strand thickness shape which products work far more than curl pattern — two people with 4B hair can need very different routines.

Strengths

Huge volume and a soft, full texture.
Holds stretched styles and protective styles very well.
Takes definition well with twists, braids and shingling.
Shapes beautifully into afros, puffs and sculpted styles.

Common challenges

Little natural definition without styling.
Very high shrinkage.
Fragile at the bends — breakage is the main barrier to length.
Dryness and tangles if left loose for long.

How to care for 4B hair

Pre-poo with an oil or conditioner before cleansing to reduce tangles and protein loss.
Detangle only when hair is wet and coated with conditioner, using fingers first.
Moisturize with a water-based leave-in and seal with an oil or butter (LOC or LCO).
Deep condition every wash day; steam or a heat cap helps if products sit on top.
Use stretched and protective styles to keep ends safe between wash days.
Avoid tight styles at the edges — tension over time can damage follicles.

Styles that suit 4B hair

Two-strand twists and twist-outs
Shingled wash-and-go
Bantu knots and knot-outs
Afros and picked-out shapes
Box braids, knotless braids and Senegalese twists (with low tension)
Wigs and crochet styles with your own hair protected underneath

Shrinkage: Very high — about 60–75%.

How hair typing works

The 1–4 / A–C chart sorts hair by the shape strands take on their own: 2 is wavy, 3 is curly and 4 is coily, and the letters go from looser (A) to tighter (C). It is a widely used convention rather than a scientific scale — researchers who measured curl objectively found it varies continuously, which is why many heads sit between two types.

Our hair type quiz scores eight observations of clean, product-free hair: wet strand shape, the pencil test, curl width, shrinkage, a single dry strand, a product-free wash, root-to-end pattern and how fast hair dries out. Use your type to set styling expectations and handling habits; use porosity, density and strand thickness to choose products.

4B at a glance

	4B
Family	Coily
Pattern	Sharp Z-shaped bends, less defined
Curl width	Angles rather than round coils
Typical shrinkage	60–75%
Common needs	Extra moisture; shingling or twists for definition

See the full chart of all nine types.

Frequently asked questions

What is the difference between 4B and 4C hair?

4B hair bends in visible zig-zags and can form defined clumps when styled. 4C hair is tighter still, with very fine bends that are hard to see as a pattern, and it usually shrinks even more.

How do I define 4B hair?

Most 4B definition comes from styling: shingling a cream and gel through small sections, two-strand twists, or braid-outs. Applying products to very wet hair helps the strands clump together.

Why does my 4B hair break so easily?

Each sharp bend is a weak point, and dry coily hair knots easily. Detangling only when wet and conditioned, keeping ends moisturized, sleeping on satin and choosing low-tension styles all reduce breakage.