Hair porosity is about how your cuticle actually behaves — how fast it absorbs water, how long it stays moisturized, how it handles humidity — not a strand floating in a glass. Answer six quick questions to find out whether your hair is low, medium, or high porosity, plus a real check for whether your roots and ends are behaving differently.
The float test — dropping a strand in a glass of water to see if it sinks or floats — gets shared constantly, but it's considered unreliable by most hair scientists and stylists. This quiz uses a behavior-based approach instead.
A clean strand has natural surface tension that can keep it floating regardless of actual porosity, and leftover product, oil, or buildup on the strand skews the result further. A single shed strand also rarely represents your whole head.
How your hair actually absorbs water, how long it stays moisturized, and how it reacts to humidity reflect real cuticle behavior across your whole head — not one strand under artificial conditions.
Buying products without knowing your porosity is one of the most common reasons a "highly rated" product doesn't work for you — the same ingredient that fixes frizz for one porosity type can weigh another one down completely.
Anyone who feels like they've "tried everything" without results, anyone who colors or heat-styles regularly, and anyone building a routine for the first time who wants to shop with an actual answer instead of trial and error.
Long hair can have low porosity at the root, where growth is newest, and high porosity at the ends, where years of heat, color, and styling have worn down the cuticle. If your quiz answers feel like they're pulling in two directions, that's often exactly why — and it's worth checking both zones separately.
Hair porosity describes how easily your hair absorbs and retains moisture, based on the condition of your cuticle — the outermost layer of each strand. A flatter, tighter cuticle means lower porosity; a raised or gapped cuticle means higher porosity.
Not reliably. A clean strand's natural surface tension can keep it floating regardless of actual porosity, and leftover oil or product residue affects the result further. Most stylists and trichology educators no longer recommend it as a standalone test.
Your roots are newer growth that hasn't been exposed to much heat, color, or environmental wear yet, while your ends have accumulated years of it. Coloring, bleaching, and regular heat styling raise the cuticle, which is why ends often run higher porosity than roots.
Yes. While porosity has a genetic baseline, chemical treatments and heat styling can raise it over time. Retaking this quiz every few months, especially after a color change, is a good habit.
No — they're separate characteristics, though related. Tighter curl patterns tend to run slightly higher porosity because the cuticle lifts at each bend, but two people with the same curl pattern can still have very different porosity levels.
Lightweight, water-based products, gentle heat to help absorption, and occasional clarifying washes to prevent buildup, since heavier products tend to sit on top rather than sink in.
A sealing step after moisturizing — oils or butters that lock hydration in — along with occasional protein treatments to help reinforce a raised or damaged cuticle.
It's generally the easiest to work with since most products perform close to how they're designed to, but low and high porosity hair can both be perfectly healthy — they just need different care approaches.
Every few months is reasonable, and definitely after a significant color, bleach, or chemical treatment, since those can shift your porosity meaningfully.
Yes — these processes lift the cuticle to deposit or remove color, which typically raises porosity, sometimes significantly depending on how much lift was involved.
Yes, easily. Curl pattern and porosity are determined by different structural factors, so it's common for two people with near-identical curls to need very different products.
No. This quiz gives a behavioral estimate based on how your hair acts day to day, not a clinical measurement. For a precise assessment, a trichologist can examine your cuticle directly.
Yes — porosity applies to every hair type, not just curly or textured hair. Straight hair can be low, medium, or high porosity just like any other type.
This is common, especially if you color or heat-style, and it often means your roots and ends are behaving differently. Use the roots-and-ends check in your result to get a clearer answer for each zone.
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