Hair Porosity 101: How to Find Your Porosity and Choose the Right Products

Ever wonder why a product that works wonders for your friend does nothing for your hair, or why your curls feel dry no matter how much conditioner you use? The answer is often hair porosity. Understanding your porosity is one of the most powerful things you can do for curly and afro hair, because it tells you exactly how to add and keep moisture.

In this guide you will learn what porosity is, how to test yours at home, and the best natural products and routines for low, medium, and high porosity hair.

What is hair porosity?

Hair porosity is your hair's ability to absorb and hold moisture. It is determined largely by how the outer layer of your hair, the cuticle, lies. When the cuticles are tightly closed, water struggles to get in. When they are raised or have gaps, water gets in easily but escapes just as fast.

Porosity is partly genetic, but it is also affected by heat styling, coloring, bleaching, and general wear over time. There are three broad categories: low porosity, medium (or normal) porosity, and high porosity.

How to test your hair porosity at home

You do not need a salon to get a good idea of your porosity. Try these two simple tests:

The float test

Take a clean strand of shed hair (no product on it) and drop it into a glass of room-temperature water. Wait two to four minutes. If it floats, you likely have low porosity. If it sinks slowly and sits in the middle, you are probably medium porosity. If it sinks quickly to the bottom, you likely have high porosity.

The strand and spray tests

Run your fingers up a strand toward the scalp. If it feels smooth, your cuticles are tight (lower porosity). If it feels bumpy or rough, your cuticles are raised (higher porosity). You can also mist a section with water: if it beads on top, that is low porosity. If it soaks in immediately, that is high porosity.

The float test is a helpful starting point, not a lab result, so use it alongside how your hair actually behaves day to day.

Low porosity hair

Signs: products tend to sit on top of your hair, water beads up before soaking in, your hair takes a long time to get fully wet and a long time to dry, and it can feel like products cause buildup.

What helps:

• Use warmth to open the cuticle, applying your deep conditioner or mask with a little heat (a warm towel or shower steam) helps it absorb.
• Choose lightweight, water-based products and avoid heavy butters and oils that just sit on top.
• Apply products to warm, damp hair rather than soaking wet hair.
• Clarify gently from time to time so product does not build up on the surface.

A lightweight leave-in and our natural curl defining cream are good low-porosity friends because they hydrate without sitting heavy on the strand.

Medium porosity hair

Signs: your hair accepts moisture easily, holds styles well, dries in a reasonable amount of time, and generally feels balanced. This is often considered the easiest porosity to care for.

What helps: a consistent routine of gentle cleansing, regular conditioning, and a weekly mask is usually enough to keep medium porosity hair thriving. Avoid over-processing with heat or chemicals so your hair stays in this happy middle zone. A balanced mix of a leave-in and a curl cream keeps definition and softness without much fuss.

High porosity hair

Signs: your hair drinks up water and products instantly, dries quickly, often feels dry or frizzy, and may tangle easily. High porosity is common in hair that has been colored, bleached, heat-styled, or is naturally very coily.

What helps:

• Layer your moisture and then seal it in. The LOC or LCO method (below) is ideal.
• Use richer, creamier products and natural oils and butters like shea to fill in and smooth the raised cuticle.
• Deep condition often, high porosity hair loses moisture fast, so a weekly (or twice-weekly) mask makes a big difference.
• Rinse with cool water at the end of your wash to help smooth the cuticle.

A rich hair mask followed by a sealing hair oil helps high porosity curls hold onto the moisture they so easily lose.

The LOC and LCO methods explained

These two layering techniques are especially useful for medium and high porosity hair. The letters stand for the order in which you apply products:

• LOC: Liquid (water or a water-based leave-in), then Oil, then Cream.
• LCO: Liquid, then Cream, then Oil.

The idea is simple: start with moisture (liquid), then lock it in. High porosity hair often prefers LOC, with oil sealing before the cream, while some find LCO works better for them. Experiment with both and keep the order your hair likes best.

Why porosity matters more than your curl type

Curl type (3a, 4c, and so on) tells you what your curls look like. Porosity tells you how to care for them. Two people with the exact same curl pattern can need completely different products if one has low porosity and the other has high porosity. That is why matching your products to your porosity, not just your curl shape, is the real key to consistent results.

Frequently asked questions

Can my hair porosity change?

Yes. While your baseline is genetic, coloring, bleaching, heat, and damage can raise your porosity over time. Gentle, sulfate-free care and regular deep conditioning help keep it healthy.

Can I have different porosity along the same strand?

Definitely. It is common to have lower porosity near the roots (newer hair) and higher porosity at the ends (older, more worn hair). Treat your ends with extra moisture and care.

What is the best product for high porosity hair?

Look for rich, creamy moisturizers and sealing oils or butters. A deep conditioning mask used weekly, followed by an oil to seal, is the most impactful combination for high porosity curls.

Is low or high porosity better?

Neither is better, they simply need different care. Low porosity hair holds moisture well once it gets in, while high porosity hair absorbs quickly but needs help holding on. The goal is a routine matched to your type.

Find your porosity match with DÉLSER

Once you know your porosity, choosing products becomes far less of a guessing game. Our natural, sulfate-free range for curly and afro hair includes lightweight leave-ins for low porosity and rich masks and sealing oils for high porosity. Browse the full DÉLSER collection and build a routine that fits your hair.

New to textured hair care? Start with our Curly Girl Method beginner's guide, then put it all together with our step-by-step wash day routine for curly and afro hair.