How to care for low, medium, and high porosity hair (Plus three porosity tests you can do today!)


HEY! What’s your hair type??????

what's your hair type or curl pattern?

How many times have you been asked this, or wondered it for yourself? Let’s be honest, we’ve all obsessed at least a little bit about our hair type or curl pattern. Maybe it’s somewhere in-between 3c and 4a, or maybe you have 4a, 4b, AND 4c in different parts of your hair! As one of the most visible characteristics of natural hair, it can seem all-important, and many people think knowing their hair type will ultimately determine how to care for their hair.

But contrary to popular belief, it’s not all about hair type. In fact, your hair has other characteristics that are even more important to know in your natural hair journey.

The truth is, people with the same exact curl pattern may have hair that behaves extremely differently. This is often due to another important but less visible characteristic of hair, called porosity.

SO… WHAT IS POROSITY?

Porosity is a measurement of your hair’s ability to absorb and hold moisture. You can also think of it as indicating how easily moisture can penetrate your hair. Porosity is determined by the structure of your cuticle- the outer layer of your hair. Low porosity hair has a tightly bound cuticle layer, making it difficult for moisture to penetrate (but also difficult for moisture to escape, once it’s in your hair.) On the other hand, high porosity hair has gaps and holes in the cuticle, allowing moisture to easily pass in and out. Porosity is determined by genetics, but can be altered by external factors like heat and chemical processing.

natural hair porosity diagram

HOW TO DETERMINE POROSITY

Porosity is very simple to determine: there are three tests you can do right now!

natural hair porosity float test

  1. The Float Test: Take some strands of hair from your brush or comb (note: use clean hair! Hair products can alter your results), and drop them in a bowl of water. Let them sit for a few minutes. If your hair floats after the time is up, you have low porosity. If it sinks, you have high porosity. (It may float somewhere in the middle of the bowl if you have medium porosity.)
  1. The Slip ‘n Slide Test: Take a strand of hair and slide your fingers up it, toward your scalp. If you feel small bumps along the way, you have high porosity. If the shaft is smooth, your cuticle is bound tight and you have low porosity hair.
  1. The Spray Bottle Test: Take a small section of your hair and mist it with a spray bottle. Watch closely: if the water beads up on your hair, it is low porosity. If it absorbs quickly, your hair is high porosity. If you notice the water sitting on your hair for a couple minutes before absorbing in, you have medium porosity hair.

Take a couple minutes now and determine your hair porosity. Then, read on to find out how to take care of your hair!

I FOUND OUT MY HAIR POROSITY. NOW WHAT?

Low Porosity Hair is moisture resistant- this means that it may be hard to get moisture into your hair, but once you do, you don’t need to worry as much about your hair drying out. Your curls can also be prone to product buildup, especially from protein-rich products. What to use:

  • Protein-free daily conditioners with humectants (products that attract moisture) like honey or glycerin.
  • Moisture-rich products such as jojoba oil, Shea butter, coconut oil, or mineral oil.
  • Lighter or liquid-based products will help avoid product build up.
  • The Dull Solution of NaturAll Club’s Avocado Deep Conditioner is rich in moisture to penetrate your low porosity hair, but also is less concentrated with oils, which will help you avoid product buildup.

beautiful natural hair types

Medium Porosity Hair has a looser cuticle layer, allowing for a steady but moderate flow of moisture in and out of your hair. Medium porosity stands up well to styling, coloring, and chemicals- which means you should be careful! Frequent treatment can slowly increase the porosity of your hair, making it more difficult over time to maintain such styles and treatments. How to care for medium porosity hair:

  • Avoid protein in your daily regimen.
  • Deep condition periodically with a product that does include protein.
  • Use any solution of NaturAll Club’s Avocado Deep Conditioner to keep your hair moisturized and nourished.

natural hair and hair porosity

High Porosity Hair has gaps and holes in the cuticle layer, which allow moisture to pass quickly in and out. This can lead to frizz and tangling in humid weather, and extreme dryness in dry weather. You’ll need to be careful with activities like swimming or bathing that involve a lot of moisture getting into your hair, since this can cause breakage. What to use:

  • Anti-humectants, especially when it’s humid, will seal your cuticles and prevent them from absorbing too much moisture. (Ex: raw shea butter, coconut oil, extra virgin olive oil, palm oil)
  • Leave-in conditioners and moisturizers will provide your hair with moisture through the day, but use a sealer such as Avocado Oil to retain moisture and prevent dryness.
  • The Damaged Solution of NaturAll Club’s Avocado Deep Conditioner, which is highly concentrated with the moisture your hair needs, but also contains beneficial natural oils that will keep your hair moisturized.

natural hair porosity and diversity

Remember, there are no "good" or "bad" hair types- it's all about knowing how to care for the hair that you have. Two people with the same curl patterns may have different porosity, and therefore need to use very different products.

However, there is one product you should use regardless of hair porosity: deep conditioners. A deep conditioning treatment is important for all curly hair types, since it provides nutrients that all hair needs to grow and remain strong. Check out our all-natural Avocado Deep Conditioners here.


34 comments


  • Florine Bedford

    I have combination hair after the test. High & low. My hair looks dull & dry no matter what I do. It’s really thick & natural.


  • Imade

    Did the water test hair floated never went down. I’m confused however because my hair dries incredibly fast and no product seems to be able to maintain unless tons of coconut oil one but was greasy to no return. Also when I spray my hair it beads on the top but when I have my shower cap on for maybe 30 minutes most has saturated in my hair but my hair dries extremely quickly. Can anything work or must i except my natural yet my Jerry curl like existence to make it through a while day without moisturizing?


  • Nife

    Hi, you mentioned that medium porosity allows a steady flow of moisture in and out. Does that mean that if you have medium porosity hair, you shouldn’t use humectants and also you should seal. When I use humectants, my hair gains loses moisture from the environment pretty easily and consistently and causes hygral fatigue.


  • Nadine FRANCIS

    I did the test and found out l have high porosity hair, l had locs for 10 years and l cut it two years ago and still can find a product that work on my hair, the gels dry my hair l get the curl but within a hour my hair is dry as ever. What to do


  • Shinari

    I don’t know what’s right for me and my daughters hair. She’s four years old and I know she has good hair, but I’m at a lost of how to take care of it she rarely sheds thank God, but it’s dry all the time any product I buy instead of this oil conditioner sits on the top of her hair and when I shampoo her hair the water saturates well, but after I rinse her out its dry, rough and the conditioner won’t saturate at all and it’s frizzy. My hair is dry all the time, but I notice a couple different leave in conditioners it saturates well my curls are popping, but it’s kind of rough and shrinkage is real then it drys up quickly. Shrinkage ND dryness is what we have bad and I also did the water test my went down immediately and hers floated. Please help!


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