How to Care for High-Porosity Hair

When it comes to building a haircare routine, your hair type is only part of the equation. Equally important is your hair porosity, which describes how readily your strands absorb and retain moisture.

If you have high-porosity hair, meaning porous hair, your strands absorb moisture easily but lose it just as quickly. As a result, high-porosity hair is often prone to dryness, dullness, and frizz. Hydrating products alone may not be enough to keep your strands balanced; you’ll also want products that help seal in moisture. Ahead, we’ll explain what high-porosity hair is, why porosity matters, and how to build a routine that helps keep your hair hydrated, soft, and healthy-looking.

What Is High-Porosity Hair?

High-porosity hair is like a sponge: It absorbs moisture readily but can lose it just as quickly. This can happen when the hair’s outermost layer, the cuticle, becomes damaged or disrupted. As a quick overview, the cuticle is made of overlapping cells that resemble tiny shingles. When hair is healthy, these shingles generally lie flat; however, several factors—including chemical processing, heat styling, and environmental wear and tear—can cause them to lift, allowing moisture to move more freely both into and out of the strands.

Genetics, as well as your natural hair texture, can also influence hair porosity. Those with curly or coily hair, for example, are more likely to have high-porosity hair than those with straight strands. There’s no such thing as “bad” hair porosity, but understanding yours can help you choose products that better support your strands.

What High-Porosity Hair Looks and Feels Like

The most common sign of high-porosity hair is dryness, but that’s far from the only sign. Other indications that your hair may be more porous include:

• Dries quickly: High-porosity hair tends to soak up water readily in the shower but may also dry unusually fast as it loses moisture.
• Rough or bumpy texture: Strands may feel coarse or uneven when you run your fingers from tip to root, which can be associated with raised or damaged cuticles.
• Frequent tangling and frizz: Raised cuticles can create friction between strands, which may contribute to tangles, knots, and stubborn frizz.
• Dull appearance: High-porosity hair can look dull because an uneven cuticle surface scatters light rather than reflecting it evenly.
• Breakage and split ends: High-porosity hair can be more vulnerable to damage, which may contribute to breakage and split ends, especially with frequent brushing, heat styling, or chemical processing.

High-Porosity Hair Tests You Can Do at Home

If you’re just learning about hair porosity, you may be wondering how to figure out where your strands fall. The good news is, you don’t need a salon appointment to get a general idea. There are a few simple ways to test your hair’s porosity at home

1. The water float test

The water float test is an easy way to get a general idea of your hair’s porosity. To try it, you’ll need just two things: a strand of clean, dry hair and a glass of room-temperature water. Drop the strand into the water and watch it for about two to four minutes.

If the strand sinks to the bottom quickly, it may indicate high porosity, meaning the hair readily absorbs water. If it stays floating on the surface, it may indicate low porosity. A strand that remains suspended somewhere in the middle may indicate medium porosity. Keep in mind that the water float test is only a general indicator of porosity—leave-in products or buildup on the hair can affect your results.

2. The spray bottle test

The spray bottle test is another simple way to get a general idea of your hair’s porosity. Start with a small section of dry hair and lightly mist it with water from a spray bottle.

High-porosity hair tends to absorb water quickly, while water sprayed onto low-porosity hair may bead up on the surface rather than sink in. Water that absorbs gradually, without immediately soaking in or beading up, may indicate medium porosity. This test can be especially useful for those with textured hair, since natural hair can have different curl patterns—and porosity levels—across a single head of hair.

High- vs. Low-Porosity Hair: Side-by-Side Comparison

Hair porosity describes how readily your strands absorb and retain moisture, largely based on the condition of the cuticle. In high-porosity hair, the overlapping scales that make up the cuticle are more raised or damaged, allowing moisture to enter and escape easily. Low-porosity hair has scales that lie more tightly together, making it harder for moisture to penetrate, while medium-porosity hair falls somewhere in between.

The Best L’Oréal Paris Systems for High-Porosity Hair

Whether your high-porosity hair looks dry and dull, feels rough or brittle, or shows signs of damage from color treatments and heat styling, the right haircare routine can help restore its soft, smooth, healthy-looking appearance. Below, discover some of our favorite high-porosity hair products to shop right now.

L’Oréal Paris EverPure Sulfate-Free Glossing System

Glossing treatments can help restore shine and smoothness to dull, dry hair. While professional hair glossing treatments are done at the salon, you can achieve similar results at home for a fraction of the price with the L’Oréal Paris EverPure Sulfate-Free Glossing system. Featuring the L’Oréal Paris EverPure Sulfate-Free Glossing Shampoo, L’Oréal Paris EverPure Sulfate-Free Glossing Conditioner, and L’Oréal Paris EverPure Sulfate-Free Glossing 5-Min Lamination Hair Mask, this glycolic acid-powered trio smooths, softens, and delivers up to five days of intense, glass-like shine. The in-shower mask also helps to seal the hair fiber, leaving your strands silky and smooth.

L’Oréal Paris EverPure Sulfate-Free Bond Repair+ System

If you’re noticing increased dryness after heat styling or chemical treatments, damage is likely the cause. To strengthen your hair—and protect against future damage—we recommend reaching for the L’Oréal Paris EverPure Sulfate-Free Bond Repair+ System. Each of the four products in the lineup contains a Bond + Amino Acid complex designed to reinforce weakened hair bonds and strengthen hair from the inside out.* Start with the L’Oréal Paris EverPure Sulfate-Free Bond Repair+ Pre-Shampoo Treatment before cleansing and conditioning with the L’Oréal Paris EverPure Sulfate-Free Bond Repair+ Shampoo and L’Oréal Paris EverPure Sulfate-Free Bond Repair+ Conditioner. For added shine, work the L’Oréal Paris EverPure Sulfate-Free Bond Repair+ Oil-in-Serum throughout your strands post-shower to boost shine, enhance softness, and protect against heat damage.

*vs. untreated hair after 6 applications

L’Oréal Paris Elvive Glycolic + Gloss System

You can’t permanently smooth the lifted scales on a damaged hair cuticle, but the L’Oréal Paris Elvive Glycolic + Gloss system can smooth your strands. The three-part system, powered by glycolic acid, laminates the hair cuticle, leaving your hair up to 14 times smoother in a single use. To reap the benefits of the system, lather up with the gentle L’Oréal Paris Elvive Glycolic + Gloss Shine-Boosting Shampoo, then replenish moisture with the coordinating L’Oréal Paris Elvive Glycolic + Gloss Shine-Boosting Conditioner. Finish your routine with the L’Oréal Paris Elvive Glycolic + Gloss High-Shine Leave-In Serum, which adds mirror-like shine without any heavy or greasy residue.

Ultra Care Conditioners

Even if you don’t naturally have high-porosity hair, repeated coloring can leave your hair drier and more porous. To help care for color-treated strands, consider adding a targeted deep conditioning mask into your weekly routine. These formulas are designed specifically for color-treated hair and can help address common concerns, including dryness, dullness, and brittleness.

For deep hydration, try the L’Oréal Paris Excellence Moisture Lock Ultra Care Conditioner. It’s formulated with hyaluronic acid and helps lock in hydration for smooth, soft, healthy-looking hair. If dullness is your most pressing concern, the L’Oréal Paris Superior Preference Shine Protect Ultra Care Conditioner, formulated with Vitamin E and a protective UV filter, is an excellent choice. And for fragile strands, we recommend the L’Oréal Paris Feria Strength Repair Ultra Care Conditioner (pictured below). Its citric acid-powered formula helps strengthen and reinforce brittle hair while deeply hydrating the hair fiber for silky, smooth strands and long-lasting color vibrancy.

Step-by-Step Care Routine for High-Porosity Hair

The exact steps and frequency of your high-porosity hair routine will vary depending on the haircare system and products you use, so always follow the instructions on each product. In general, though, a high-porosity hair routine should focus on cleansing without stripping, replenishing moisture, and sealing it in. Here’s what that can look like:

1. Cleanse without stripping: Start by washing your hair with a gentle shampoo, such as the L’Oréal Paris EverPure Sulfate-Free Bond Repair+ Shampoo, to remove excess oil, product residue, and other buildup without stripping your hair of essential moisture. When lathering up, use lukewarm water rather than very hot water, which can contribute to dryness.
2. Condition to replenish moisture: After washing your hair, reintroduce moisture with a hydrating conditioner (ideally, a formula designed to pair with your chosen shampoo). If you’re prone to greasy roots, apply your conditioner from the mid-lengths to the ends, avoiding your scalp.
3. Deep condition: Once or twice a week, swap your regular conditioner for a deep-conditioning mask, like the L’Oréal Paris Excellence Moisture Lock Ultra Care Conditioner, to give dry or damaged strands an extra dose of moisture and conditioning.
4. Apply a leave-in treatment: After showering, work a hydrating leave-in treatment through damp hair, focusing on the mid-lengths and ends. This can help add moisture and improve softness and manageability.
5. Seal in moisture: Finish with a hair oil or serum, like the L’Oréal Paris EverPure Sulfate-Free Bond Repair+ Oil-in-Serum, to help seal in moisture and reduce moisture loss. If you use multiple leave-in products, use the LOC method—this approach is ideal for helping high-porosity hair retain moisture.

Next Up: Low-Porosity vs. High-Porosity Hair: How To Tell The Difference

Photo courtesy of L’Oréal Paris