Cork is a natural product which is obtained from two types of the cork tree, Quercus Suber and Quercus Occidentalis. In the structure of its cells, which are spherical, we can find membranes which internally have air vacuoles. The contact between its cells is complete and perfect - without any pores or gaps – that gives the cork very special characteristics, of which can be emphasized its lightness and elasticity. The durability of the cork is high and it has an excellent capacity for thermal and sound insulation. What more? It also has a good chemical stability since it´s only affected by mineral acids and strong alkaline-based products.