Porosity of hair refers to how large or small the "pores" on hair are. Porous hair loses its moisture content much more easily than hair that is not porous. Damaged hair is always more porous than healthy hair.
Porous hair is more prone to breakage, split ends and other kinds of damage.
Hair that dries quickly tends to be more porous than hair that takes a long time to dry. However, the rate at which hair dries is obviously influenced by external factors, for instance, if it's a hot, sunny day or if your central heating system is set high then your hair will tend to dry faster than if it's cold or if your homes's heating is set low.
To test your hair porosity more specifically do the following:
The Hair Porosity Test
Porous hair will start to sink right away; the more porous, the faster the hair sinks. Hair that is not porous will float for a long while before it starts to sink.
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By Heather Katsonga-Woodward
I was a natural hair blogger and mixtress living between London & Chicago from 2012 to 2017. I always thought I was 4C but some say 4B; images below - you decide! Heather xx