Fresh mattresses with pocket core are made of high quality springs which are sewed each individually into pockets and then connected into a core, securing that the pressure on one string doesn't affect other springs. Here every spring is collapsed independently. This means that the core collapsed only on the places where the pressure of the body exists, therefore achieving extreme flexibility of the mattress while uniformly adjusting every position of the body while lying. At bigger mattress dimensions, this type of core prevents tumbling the lightweight person toward the heavyweight one.
This mattresses comfort is secured by layers of PU, HR or memory foam. Tarpaulins can be non-removable from "žakard" canvas or removable and washable from double jersey canvas (Aloe Vera, Bamboo, Tencel)