Our space blanket, also known as a mylar blanket (for first aid, safety, thermal, or weather blanket), is a light, airy blanket made from heat-reflecting plastic. The thin sheet of plastic is coated with a metallic reflector known as a metalized polyethylene, which reflects ups to 97% of radiated heat. The design of the space blanket helps reduce the loss of heat in a person?s body due to thermal radiation, evaporation, or convection. the blanket was first developed by NASA?s Marshall Space Flight Center in 1964. Great for maintaining temperature during a heated stone massage. ntensify the soothing and detoxifying effects of far-infrared rays with this heat reflective Mylar thermal blanket. This blanket can be used with your far-infrared ray therapy mat to enhance its benefits. The design of the space blanket helps reduce the loss of heat in a person?s body due to thermal radiation, evaporation, or convection. the blanket was first developed by NASA?s Marshall Space Flight Center in 1964. Great for maintaining temperature during a heated stone massage. Intensify the soothing and detoxifying effects of far-infrared rays with this heat reflective Mylar thermal blanket. This blanket can be used with your far-infrared ray therapy mat to enhance it benefits.