Our hair is made up of three layers named, cuticle (outermost layer), Cortex(middle), and Medulla (innermost layer). The outermost layer is made up of overlapping cells with neutral charge that normally sits smoothly and gives your hair the shiny and sleek feel. However, actions like perming, colouring, straightening your hair, even a swim can damage this layer. This leads to the hair becoming rough, frizzy, and tangled.