775. Protection From the Elements

Shabbos 19:16

A man may go out on Shabbos wearing wigs of flax or wool for sores on the head provided that he has colored them with oil and wound them, or gone out wearing them at least briefly before Shabbos; all of these serve to designate these wigs for use as a hairpiece. If he did not perform one of these acts, he may not go out wearing them on Shabbos.

Shabbos 19:17

We may go out wearing coarse materials for protection from the rain even though they are not usually worn as garments. We may not, however, go out wearing furniture, utensils or mats as protection from the rain. (These are not garments at all, so he would be considered to be carrying them.) If bedding is soft and thin the way that garments are, one may go out wearing them as a turban on Shabbos; if they are firm, they are considered to be a burden and one may not wear them in this fashion.