Sauna bag
From LatexWiki - the free latex fetish encyclopedia
A sauna bag is a bag for wearing in a sauna to encourage sweating. It is large enough to contain a person, and has an open-fronted hood with a drawstring to cover the head tightly. It has a zip at the front designed to be easily opened and closed from inside.
Typical materials for its manufacture are latex, rubberised cotton or satin, Shiny Black Rubber and polyurethane.