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An easy, at-home hair porosity test can help you to understand how easily your hair absorbs and retains moisture. This makes it a useful starting point for choosing products and building a routine that suits the unique needs of your hair.
Once you know what the deal is, you can then select a Dove shampoo and conditioner that will give you the best results. While these at-home tests aren't a clinical diagnosis, they can provide valuable insights into how your strands respond to moisture, so you can make the right choices to get the most out of every wash.
What is Hair Porosity?
The term ‘hair porosity’ describes how easily your hair absorbs and holds onto moisture. The best way to work out how to determine hair porosity is by understanding your hair's outer protective layer, AKA the cuticle. Once you know how this vital hair structure of yours behaves, it's much easier to choose products and routines that will lead to healthy-looking locks.
Understand the hair cuticle and moisture retention
The cuticle is the hair's outer layer. It’s made up of overlapping shingle-like scales that help regulate how moisture moves in and out of each strand. When the cuticle lies tightly and smoothly against the hair, moisture enters more slowly but stays sealed in for longer. This is known as low porosity hair.
When the cuticle scales are lifted or open, moisture moves in and out of the hair more freely, resulting in high porosity hair. Medium porosity sits comfortably between the two, balancing moisture absorption with retention.
The 3 porosity types at a glance and why it matters
- Low porosity: Tight cuticles resist moisture entry and may be more prone to product buildup. This means lightweight, water-based formulas absorb better than richer ones, which tend to just sit on top.
- Medium porosity: Balanced cuticles absorb and retain moisture with relative ease. This means your hair is fairly low-maintenance and responds well to a consistent, everyday routine.
- High porosity: Raised or more porous cuticles which absorb moisture quickly but may lose it just as fast. This means richer, moisture-sealing formulas help hydration stick around longer.
Moisture is important because it’s what keeps your hair flexible, strong and shiny, and that's exactly what the right porosity-matched routine helps you achieve.
"It's important to understand that porosity isn't always the same from root to tip, either," explains Beth Labrecque, beauty and well-being R&D engagement and activation manager at Unilever. "Many people have more porous ends than roots, since the ends are older than the new growth closest to the scalp."
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The Float Test & Spray Test: Your At-Home Hair Porosity Test
A hair porosity test can help you understand how your hair responds to moisture, but it's most useful when you pair it with what you notice in your everyday routine.
There are two types: the float test and spray test, and both offer simple ways to assess your hair at home, although neither provides a clinical diagnosis. Instead, think of them as a helpful first read that can guide your product choices and care routine.
The float test: Step-by-step
- Take a clean strand of naturally shed hair that is free from styling products, oils and conditioner.
- Fill a clear glass with room temperature water.
- Gently place the strand on the surface of the water.
- Wait two to a few minutes without disturbing the glass.
- Watch what your strand does. Floating is often read as a sign of low porosity, and sinking as high porosity, but things like strand thickness, natural oils, product buildup, and water surface tension can affect the result too. Think of it as a helpful clue, not a final answer.
The spray test: A quicker alternative
Mist a small section of clean, dry hair with water and watch how it behaves. If water beads on the surface before absorbing, your hair is likely low porosity. If it sits briefly before soaking in, you probably have medium porosity. If it absorbs almost immediately, your hair may have high porosity.
Tips for the most accurate result
Use freshly washed, product-free hair and room-temperature water. Hot water can temporarily lift the cuticle while cold water can encourage it to lie flatter.
Most importantly, treat these at-home tests as a guide rather than a verdict. Product buildup, previous treatments and testing only a single strand can influence the result, so combine what you see with how your hair behaves on wash day for the clearest picture.
Caring for Low Porosity Hair
High porosity hair absorbs moisture quickly but can lose it just as fast, so consistency matters more than applying increasingly rich products. A routine that combines lasting hydration with ingredients that coat and smooth the hair's surface can help seal moisture in, so strands feel smoother, softer and easier to manage over time.
How to open the cuticle for better moisture absorption
Wash with warm water, as it may help improve how well products spread and help hydrate hair fibers, making your conditioner easier to distribute evenly. Use lightweight, water-based formulas that hydrate without leaving heavy residue behind. If products start to feel like they're coating your hair instead of nourishing it, use a clarifying shampoo regularly to remove buildup and give moisture a clearer path into the hair.
You can find more practical tips in our guide on how to moisturize low porosity hair.
Best Dove products for a low porosity hair care routine
If your hair becomes weighed down easily, choose products that deliver hydration without adding unnecessary heaviness. Dove Damage Therapy Daily Moisture Shampoo and Conditioner are infused with Hyaluronic Serum and Bio-Protein Care to gently cleanse and hydrate while helping fine or low porosity hair feel soft, full and naturally bouncy rather than coated.
If your roots tend to feel oily between washes because product residue builds up quickly, our guide on how to prevent greasy hair also explains how using clarifying products in your routine can help keep your hair feeling fresher for longer.
Caring for High Porosity Hair
High porosity hair absorbs moisture quickly but can lose it just as fast, so consistency matters more than applying increasingly rich products. A routine that combines lasting hydration with ingredients that support the hair's structure can help strands feel smoother, stronger and easier to manage over time.
How to seal moisture into high porosity hair
Choose richer conditioning formulas that help replenish moisture and keep it sealed in with a smooth coating of nourishing ingredients. Products like the Dove Damage Therapy Bond Strength Collection nourish highly porous hair with an external shield, holding moisture in, while helping reinforce weakened hair fibers, improving resistance to breakage with continued use.
Best Dove product approach for high porosity hair
If your hair has become more porous after repeated heat styling, coloring or UV exposure, look for products that support both moisture and hair strength. Dove Damage Therapy Bond Strength Shampoo and Conditioner are made with Bio-Protein Care and infused with Peptide Complex that works at a molecular level to strengthen hair fibers with every wash. This makes it a strong everyday option for hair that needs support maintaining softness, shine and resilience.
FAQs
The signs of low porosity hair include hair that takes a long time to get fully wet, products that seem to sit on the surface, slow air drying, and frequent product buildup. Lightweight routines, including Dove Damage Therapy Daily Moisture Shampoo, can help cleanse effectively while providing hydration without weighing hair down. The shampoo contains glycerin, a water-loving ingredient that helps attract and retain moisture, making it a good match for low porosity hair.
High porosity hair isn't always dry or damaged. Some people naturally have high porosity hair, while others develop it over time through coloring, heat styling or environmental exposure. The key is choosing a routine that supports moisture retention and hair strength, such as the Dove UV Repair & Glow range for hair exposed to everyday UV damage.
The best Dove conditioner for low porosity hair is a lightweight formula that hydrates without leaving heavy residue behind. Dove Damage Therapy Daily Moisture Conditioner is infused with Hyaluronic Serum and Bio-Protein Care to help fine or low porosity hair feel soft, smooth and full while avoiding the coated feeling richer products may leave behind. It also contains glycerin, a water-loving ingredient that helps attract and retain moisture.
Protein and peptide treatments can help strengthen hair from within, but they aren't the main answer to high porosity. Because high porosity hair loses moisture quickly, the ingredients that matter most are those that coat and smooth the hair's surface, sealing moisture in. Choose a richer conditioner that leaves a nourishing coating, and add bond-strengthening care like the Dove Damage Therapy Bond Strength Collection if your hair also feels weak or breaks easily.
Yes, hair porosity can change over time as your hair is exposed to coloring, heat styling, UV rays and other everyday experiences. Reassess your routine every few months, especially if your hair starts behaving differently. This can help you choose products that better match its current needs.
The best conditioner for thinning hair is one that moisturizes without weighing strands down, but it's important to remember that hair porosity and hair thinning are separate concerns. If thinning is related to visible hair damage, Dove Derma Scalp Density Boost Conditioner, developed with dermatologists and infused with zinc and peptides, can help strengthen fine hair and support fuller-looking density from root to tip, while persistent or sudden hair loss should be assessed by a dermatologist.
