A<unk>  A<unk>  (also known as a Mylar<unk> , emergency<unk> , first aid<unk> , safety<unk> , thermal<unk> , weather<unk> , heat sheet, or shock<unk>  is an especially low-weight, low-bulk<unk>  made of heat-reflective, thin, plastic sheeting. They are used on the exterior surfaces of<unk> craft for thermal control, as well as by people. Their design reduces the heat loss in a person's body, which would otherwise occur due to thermal radiation, water evaporation, or convection. Their low weight and compact size before unfurling make them ideal when<unk>  or weight are at a premium. They may be included in first aid kits and with camping equipment. Lost campers and hikers have an additional possible benefit: the shiny surface flashes in the sun, allowing its use as an improvised distress beacon for searchers and as a method of signalling over long distances to other people.
Space blanket
Racal suit
Face shield
Positive pressure personnel suit
Sitz bath
Mustard bath
Hip protector
Cooling vest