> I mean how can they simultaneously hold creases in the right places but resistant to creases in the wrong places? How does the fabric know which creases you n

> I mean how can they simultaneously hold creases in the right places but resistant to creases in the wrong places? How does the fabric know which creases you need and which you don’t? how do shape memory materials work in general? in this case, heat is the stimulus, which returns the fabric to its pre-set state. it's pressed and treated chemically essentially converting the fabric into an SMM.