EVA material is manufactured under high pressure and therefore has a uniform and closed cell structure. This provides it with excellent mechanical resistance, and it is dimensionally stable and does not absorb water. EVA sleeping mats are lightweight and almost indestructible - products from the nineties still serve their owners well, and even many scratches do not reduce their functionality. Because of their excellent properties, they are widely used for alpine hiking and mountaineering, and are used by expeditions to the highest mountains. Rubber bands included.