Refers to any visible deterioration of the physical properties of the material change over time. If the term is applied to tissues, this could be the appearance of scuffs, discoloration, a change in moisture resistant properties, tensile material, etc. There is also the concept of obsolescence - it is applied to things that are out of fashion, do not meet the requirements of consumers.
Wear clothes - a process that takes place under the influence of many factors. Physical factors - stretching, bending, friction, etc. Physicochemical - impact on the fabric of substances produced as a result of metabolism and other organic or synthetic substances. The most common causes of wear fabrics - this friction and bending.