Hair Porosity for Men: Why Some Hair Drinks Product

Hair porosity is how easily your hair takes in and holds on to water, oils and product. It comes down mainly to the cuticle, the outer layer of overlapping cells on each strand. When the cuticle lies flat and tight (low porosity), water beads off, hair takes ages to dry and product sits on top looking greasy. When the cuticle is raised or worn (high porosity), hair soaks things up fast, dries quickly, frizzes and feels dry again by lunchtime. Most men sit somewhere in the middle. Knowing which way you lean explains why one product works brilliantly for a friend and fails on you, and it tells you what to change.

What porosity actually is

Each hair has a cuticle made of flattened, overlapping cells, a bit like roof tiles. How tightly those tiles lie determines how readily water and product get in, and how readily they escape again.

• Low porosity: tiles packed tight. Hard to get moisture in, but once it is in, it stays.
• Medium (normal) porosity: takes in moisture without much fuss and holds it reasonably well. Most products behave as the label promises.
• High porosity: tiles lifted, chipped or missing. Moisture goes in fast and leaves just as fast.

Porosity is partly what you are born with and partly what happens to your hair. Bleaching and colouring, frequent heat styling, strong sun, chlorinated pool water and rough towelling all wear the cuticle and push hair towards high porosity. Ends are usually more porous than roots, because they are older and have taken more wear. That is why long hair can behave differently at the tips than near the scalp.

Porosity is not the same as texture or thickness. Fine, straight hair can be low or high porosity, and so can coarse, tightly coiled hair. It is one more variable, not a replacement for the others.

Signs to look for in your own hair

You do not need a test kit. Your daily experience tells you most of what you need. Run through these:

You notice	Leans low	Leans high
In the shower	Water seems to run off; hair takes a while to feel fully wet	Hair is soaked almost instantly
Drying time	Slow, stays damp for ages	Fast, sometimes dry before you have finished dressing
With product	Sits on top, looks greasy or flaky, builds up	Disappears; you keep needing more
By the afternoon	Weighed down, flat	Dry, frizzy, rough at the ends
In humid weather	Relatively unchanged	Puffs up and loses shape

If you tick mostly one column, you have your answer. Mixed results usually mean medium porosity, or porous ends on otherwise normal hair.

What about the glass of water test?

You will see it everywhere: drop a clean hair in water and see whether it floats or sinks. It is a rough guide at best. Oils, product residue, the water’s temperature and the hair’s own thickness all affect the result, and a single hair does not represent your whole head. Your experience over a few weeks is more reliable than one strand in a glass.

Looking after low-porosity hair

The challenge is getting moisture in without smothering the hair in product that never absorbs.

1. Use warm water to wash. Warmth helps the hair take in water more readily. Finish cooler if you like, but start warm.
2. Clarify occasionally. Because low-porosity hair resists absorption, product sits on the surface and builds up. A clarifying shampoo every couple of weeks clears it.
3. Choose lighter products. Water-based creams, light lotions and sprays absorb better than heavy butters and thick waxes. Our guide to clay, wax, pomade and paste explains which finishes are lightest.
4. Apply to damp hair, not soaking hair. Towel off most of the water first so product has somewhere to go.
5. Use less than you think. If your hair looks greasy by midday, halve the amount before you change the product.

Looking after high-porosity hair

Here the challenge is reversed: moisture gets in easily but escapes, so the focus is on slowing the loss and avoiding further damage.

1. Condition every wash. A rinse-out conditioner smooths the cuticle and reduces friction. Our post asking whether men need conditioner covers how to use it without weighing hair down.
2. Wash less often. Shampoo removes oils that high-porosity hair struggles to replace. Many men find every second or third day is plenty.
3. Seal moisture in. After a leave-in or cream, a small amount of oil or a richer product over the top helps keep the water inside the strand. This is the logic behind routines often used for afro and tightly curled hair.
4. Be gentle with heat and towels. Blot rather than rub. Use a dryer on a lower heat, keep it moving, and stop before the hair is bone dry.
5. Get damaged ends cut. No product repairs a split end. Regular trims remove the most porous, frayed hair and the rest of the head behaves better for it.

Mistakes that make porosity problems worse

• Adding more product when hair looks dry. On low-porosity hair, more product just means more build-up.
• Skipping conditioner on porous hair because it feels like an extra step.
• Daily hot washes and hot drying on hair that is already raised and rough.
• Swimming without rinsing. Rinse in fresh water straight after a pool session, and consider wetting your hair before you get in.
• Changing everything at once. Change one thing for two weeks, then judge.

Where the cut comes in

Porosity affects how a cut sits and how much product it needs. Low-porosity hair that is heavy and slow to dry often benefits from a little weight taken out so it moves and dries more evenly. High-porosity hair with frayed ends looks fuller and tidier once the worn length is cut away. Every visit at Highgate Cuts begins with an assessment, where the barber looks at your hair and what you need before recommending a cut or a product. If you tell us what happens when you put product in, we can usually tell you why. More on the cuts and services is on our barber page.

Questions we get asked

Can I change my hair’s porosity?

You cannot change what you are born with, but you can avoid making hair more porous through heat, bleaching and rough handling, and you can manage either type well with the right routine.

Is high porosity the same as damaged hair?

Damage is a common cause, but some hair is naturally more porous. Either way, the care is similar: condition, protect and trim the worn ends.

Why do my ends feel dry but my roots oily?

The ends are older and more porous, and the scalp’s oil does not travel far down the strand. Condition the lengths and ends, not the scalp.

Does porosity matter for short hair?

Less, because short hair is new and is cut away often. It still affects how product behaves, which is why some men find even a small amount of wax looks greasy.

---

Book with The Highgate House

Ready for a proper cut? Email us at [email protected] with the service and the day that suits you, and we will come back to you with times.

Visit The Highgate House · The barbers

The Highgate House, Archway Road, Highgate, London N6.