Now to be more concluded hair structure is composed of a protein. Each healthy hair strand contains three layers within it: 1. Inner layer: this layer is present only in very good hairs which are thick in nature and hair seems to be thick as well. 2. Middle layer: this layer is responsible for providing color and texture to the hair. 3. Outer layer: this layer serves as a defender of the middle layer. It is actually a custodian coating to preserve hair from damage. Hair Transplant in India | Ludhiana | Punjab || Hair loss treatment in Men | Women