How does Hardy portray Tess as a pure woman?

Tess of the D'Urbervilles How does Hardy portray Tess as a 'pure' woman? There are many ways in which Hardy describes his character Tess, but the theme of purity often emerges within the subtext. He does this by using Tess' physical features, language, mannerism, social interaction and he contrasts her to the other characters in the novel. The meaning of pure can be interpreted in many ways. One definition of pure is to be free from adulterants. As we learnt from the novel, Tess is not pure in that sense. Therefore, Hardy's definition moves away from the traditional Victorian perception of purity.