URSA mats are caching a craft paper that provides additional protection of the building from the wind. The vapor barrier is performed by aluminum foil, and from the effects of moisture the material protects the water -repellent solution with which it is treated. The World Health Organization conducted repeated studies that confirmed the safety of using these heaters. The scope of the use of URSA slabs and mats is due to their density. Look at the marking to find out about the density of the material. For heat — and sound insulation of ceilings, basements, ceilings, frame panels, roofs, mats with low density are used. For insulation of ventilation systems and equipment at enterprises, mats with a high density are used.