The Poskim discuss whether various accessories and apparatuses are permitted to be carried in the Reshut HaRabim (Public Domain) in a place where there is no Eruv.
The Shulhan Aruch records the custom for a woman who is about to begin counting her seven clean days to insert a piece of cloth inside her, from before sunset until dark, to insure that all bleeding has stopped. The Poskim concur that this cloth, known as a "Moch Dachuk," is not considered a garment or ornament. Therefore, she is not allowed to go out to the public domain on Friday evening, while it is inside of her.
A sanitary napkin, which is attached to an undergarment, is considered part of her clothing, and she may go out while wearing it. This is true, because it is attached to the garment and is therefore "Batel" (subsumed) to the garment. Also, it is considered a type of garment, designed to protect her body from becoming soiled.
A person may use a cane or crutches in the public domain, if they are necessary for him to walk. If they only serve to assist his walking, and do not enable it, he may not use them. The test for this is whether he uses them inside his home. A cane used solely as an ornament of stature may not be carried in the public domain.
A person with a prosthetic limb, which is properly attached, may go out into the public domain.
It is prohibited to go out with a Moch Dachuk.
It is permitted to go out with a sanitary napkin attached to an undergarment, a cane necessary for walking or a prosthetic limb.