Ordinary brick TM "Euroton" - Ceramic effective. Hollow (effective) brick is much lighter than usual, and therefore easier to work with it. Due to air pockets in the brick, reduced heat transfer between the interior space and the environment. This is a valuable skill in the wall can save heat in winter and keep the heat in summer.
Look through the pictures of houses, built of bricks TM "Yevroton - Exclusive"