Brenda, I bought some specially designed bras after a masectomy. I assumed that they were just normal pre-formed. They cause terrible itching and I will only wear one if my top/dress really needs it. I wonder if they are indeed some form of scuba fabric?
Plain cotton are much more comfortable, but they are a quite nasty shade of 'natural' beige and look as though designed to look deliberately ugly. Unfortunately in my small size there is little choice in ready to wear and having four of each type, I don't feel the urge to start making more.