Glassfibre woven exhaust lagging is a type of insulation material that is commonly used in exhaust systems. It is made of woven glass fibers that are designed to withstand high temperatures and harsh conditions.

The glass fibers are typically coated with a heat-resistant material such as silicone or vermiculite to improve their durability and resistance to moisture. Glassfibre woven exhaust lagging is used to insulate the exhaust system and reduce heat transfer to surrounding areas, which can improve safety and protect nearby components from heat damage.

It is also used to reduce the temperature of exhaust gases before they are released into the environment. Some glassfibre woven exhaust lagging products may also include additional features such as acoustic insulation or a reflective surface to improve heat retention.