Despite being able to represent selected experimental features of hair surfaces, such simplified current molecular models are not suitable to describe complex structural arrangements and overall surface properties of hair in various states, as well as the interaction of conditioning ingredients with hair surfaces, and the pathological effects of hair-related disorders . As a natural evolution of previous models, we decided to extend the description of a hair surface by incorporating a UHSP protein layer to the molecular model. In this model, chemical and physical damage are mimicked by reducing the amounts of 18-MEA. In the following sections, we will validate this model through all-atom molecular dynamics (MD) simulations of hair surfaces under different conditions, and explore in detail how this model can provide substantial insights to the complex hair cuticle surface properties.