Thin hair can be described in different ways. Some may describe hair that is very fine as thin or hair that is coarse - yet sparse in density - as thin. Many times, fine hair is some of the densest hair, as it can have more than 2,500 hairs per square inch.
So in discussing fine hair, let’s describe fine hair in this conversation as the diameter of each hair strand. We can use the term skinny hair.
Fine hair is unique in its design. There are many benefits of having skinny hair. It has characteristics that help to make it resilient to all the torture that we tend to inflict upon it on a daily basis. The outside layer made up of cuticle can have from 5 to more than 17 layers. These are much like the scales you see on a fish. They are designed to protect the cortex where all the important things in coloring, straightening and perming occur. Fine hair often has the maximum amount of cuticle layers. This helps to make up for the lack of a medulla that is often missing in skinny hair. Blow drying and rough combing and brushing, or towel drying can abrade the cuticle layer. Flat irons, curling irons and too hot of a dryer can scorch it. Chemical treatments can seriously damage it.