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Shop by what your hair actually absorbs High porosity needs sealing, low porosity needs lightweight layers. Same routine, different products. Morfose Argan Hair Mask for Dry, Damaged Hair, 16.90 Fl ozMorfose Keratin Leave-In Conditioner Spray, Detangler, 13.53 Fl ozMorfose Barcelino Hair Oil, 12 Oils for Dry Hair, 5.07 Fl ozMorfose Bond Repair Treatment for Bleached Hair, 5.07 Fl oz See all conditioners & masks → Porosity describes how easily your hair takes in water and how long it holds on to it. It is the reason two people can use the same conditioner and get opposite results — one ends up weighed down, the other still feels dry. What porosity actually is The outer layer of a hair strand, the cuticle, is made of overlapping scales. How tightly those scales lie determines how much moisture gets in and how fast it leaves. Low porosity — scales lie flat and tight. Water beads on the surface; products sit on top rather than absorbing. Medium porosity — scales are slightly raised. Hair absorbs and holds moisture without much effort. High porosity — scales are raised or damaged. Water goes in fast and leaves just as fast, so hair dries quickly and frizzes. Porosity is partly genetic and partly earned. Bleaching, permanent colour and repeated heat all lift the cuticle, which is why porosity usually rises over time rather than falling. How to test your hair porosity High porosity: seal it Morfose Argan Hair Mask for Dry, Damaged Hair, 16.90 Fl ozMorfose Barcelino Hair Oil, 12 Oils for Dry Hair, 5.07 Fl oz The float test Take a clean, dry strand of shed hair — not one pulled from your head, since the root changes how it sits. Drop it into a glass of room-temperature water and leave it for four minutes. Floats on top → low porosity Sinks slowly to the middle → medium porosity Sinks to the bottom → high porosity The test only works on clean hair. Silicone or oil residue makes any strand float, which is why people who use a lot of serum often mis-read themselves as low porosity. The two checks that are more reliable than the float test Drying time. Hair that takes a long time to air-dry is usually low porosity — water struggles to get out because it struggled to get in. Hair that is dry within an hour is usually high porosity. The spray test. Mist a small section with water. If the droplets sit on the surface as beads, porosity is low. If they vanish almost immediately, porosity is high. What to use for low porosity hair The problem is getting moisture in, not keeping it. Heavy butters and thick creams sit on the surface and cause build-up. Use lightweight, water-based products and apply them to damp, warm hair — warmth lifts the cuticle slightly and helps absorption. A spray leave-in works better here than a cream. The Keratin Leave-In Conditioner Spray is water-first (Aqua) with hydrolyzed keratin and light silicones, so it distributes without coating heavily. Skip oil as a pre-shampoo treatment on low porosity hair. It will not penetrate, and it makes the next wash harder. What to use for medium porosity hair The easiest type to care for. Regular conditioning is enough, and the main risk is over-treating. Protein-heavy products used too often can stiffen medium porosity hair that did not need repairing in the first place. A mask once a week is usually sufficient. Watch for the point where hair starts to feel coated rather than soft — that is the signal to space treatments out. What to use for high porosity hair Moisture gets in easily and escapes just as fast, so the job is sealing. That means heavier conditioners, and a sealing step after them. Start with a rich mask. The Argan Hair Mask combines fatty alcohols (cetyl and stearyl alcohol) with argan kernel oil and behentrimonium methosulfate — a conditioning base built to stay on the hair rather than rinse straight off. Then seal. For sealing, choose a real plant-oil blend over a silicone serum: the Barcelino Hair Oil is made of sunflower, castor, olive, hazelnut, sesame, black seed and coconut oils with no silicone in the list, so it works as an actual sealing layer rather than a surface shine. If your porosity rose because of bleaching, the toning and aftercare steps matter as much as the conditioning — we covered that in how to use hair toner at home. Frequently asked questions How do I test hair porosity at home? Drop a clean, dry shed strand into a glass of room-temperature water and wait four minutes. Floating means low porosity, sinking to the middle means medium, sinking to the bottom means high. The strand must be free of product or the result is wrong. Can hair porosity change? Yes, and it usually rises rather than falls. Bleach, permanent colour and heat styling lift the cuticle permanently. You cannot lower porosity, but conditioning and sealing make high porosity hair behave closer to medium. Is high porosity hair damaged hair? Not always. Some hair is naturally high porosity, particularly tightly coiled hair. But porosity that increased after bleaching or heat is damage. Why does my conditioner make my hair greasy? That is the classic low porosity signal. The cuticle is lying flat, so the product cannot absorb and sits on the surface instead. Switch to a lighter, water-based leave-in and apply it to damp hair. Should I use protein or moisture for my porosity type? High porosity hair generally benefits from both — protein to fill gaps in the cuticle, moisture and oil to seal. Low porosity hair rarely needs protein and is easily over-loaded by it; focus on lightweight moisture instead. Match the product to your porosity High porosity: mask plus an oil to seal. Low porosity: a leave-in spray instead of a heavy mask, so it absorbs rather than sits on top. Morfose Argan Hair Mask for Dry, Damaged Hair, 16.90 Fl ozMorfose Barcelino Hair Oil, 12 Oils for Dry Hair, 5.07 Fl ozMorfose Keratin Leave-In Conditioner Spray, Detangler, 13.53 Fl ozMorfose Bond Repair Treatment for Bleached Hair, 5.07 Fl oz See all conditioners & masks →