Why does denim fabric have a distinction between soft and hard

Firstly, different weaving methods result in different softness of the fabric, such as knittingDenim fabricClearly softer; Secondly, the washing method of the fabric determines its softness, for example, enzyme washing can achieve a softening effect. In addition, whether a softening agent is added during washing and the amount of softening agent used can also lead to completely different softness levels; Special processing techniques can also improve softness, such as flocking and mercerizing, which can improve softness to a certain extent. In addition, the weight of the fabric also has an impact, and generally, thick and heavy fabrics have lower softness than light and thin fabrics.