Dynamat is a patented, lightweight elastomeric butyl and aluminum constrained-layer vibration damper. It conforms and fuses easily to sheet metal and other hard substrates. Material performance is optimized for temperature ranges between 14°F and 140°F (- 10°C to +60°C) and can withstand extremes between -65°F and +300°F (-54°C to +149°C) it is resistant to aging. To keep your vehicle warm and to warm up more efficiently we use non itchy Dacron, this meets all the furniture/furnishings fire and safety regulations, it also meets the British standard: BS5852.