Glass wool is an insulating material made from fibres of glass arranged using a binder into a texture like wool. It consists of intertwined and flexible glass fibres, which causes it to “package” air, and these small air pockets result in high thermal insulation properties. Glass wool is produced in rolls or in slabs, with different thermal and mechanical properties. It may also be produced as a material that can be sprayed or applied in place, on the surface to be insulated such as cavity wall insulation, ceiling tiles, curtain walls as well as ducting. It is also used to insulate piping and for soundproofing. Natural sand and recycled glass are mixed and heated to 1,450 °C, to produce glass. Glass Wool is usually produced by a method like making cotton candy, by forcing it through a fine mesh by centripetal force, cooling on contact with the air. Mechanical strength is achieved using a binder that connects all the fibres together. A drop of bonder is placed at each fibre intersection. The resulting fibre mat is then heated to around 200 °C turning the resin into a polymer and is calendered to give it strength and stability. Finally, the wool mat is cut and packed in rolls or panels, palletized, and stored for use. It will irritate the eyes, skin, and the respiratory system.