Why would the women in the following scenarios choose shoes made with totally different materials? Deborah is a marathon runner who uses her running shoes in all weather during different times of the year. Marsha is a grandmother who wears her running shoes on warm days to play outside with her granddaughter.

Materials have specific properties that allow them to be useful in some situations and not in others.

Materials that are synthetic are not always favored by younger people.

Materials are not always sustainable and may undergo superficial changes.

Materials are being invented all the time and do not always meet a consumer’s specifications.