A method and system are disclosed for fumigating at least one region with a nonflammable gaseous mixture including phosphine. The elastic band can be in the form of a continuous ring or can have a first wrap engagement member mounted at a first end and a second wrap engagement member mounted at a second end of the elastic band and configured to securely engage the first wrap engagement member when the elastic band is wrapped around a human leg to form the ring. After use, the elements can be turned to a transport position, in which they are placed inside the body in the direction of its longitudinal axis. An exit orifice may exist in the bladder to release air from the bladder and provide back pressure in the bladder.