Mattresses may also be produced from bladders of some fluid, notably h2o or air. These date to antiquity – goatskin bladders filled with h2o have been Utilized in Persia a minimum of as early as 3600 BCE – and received elevated popularity from the 20th century with improved production. Microsoft https://konzervativniklub.cz/domacnost-a-reality/polyuretanove-matrace-pohodlny-spanek-a-kvalitni-podpora