These cotton breast form covers are very useful and a great help if you have sensitive skin problems with itchy or painful reactions to the silicone form, even if it is used in a bra pocket. Since no breast form seems to be able to mimic going bra-less, it may be possible to attach a breast form into a tee-shirt or other top by pinning through the cotton cover, where the pin goes through free space, not the silicone form. Though washable and reusable, these covers are costly for the amount of material used, and are very exactly fitting to the breast form, so must be dried flat, as instructed, to avoid shrinkage.