Base 1 from solid foams, which in the central region of a permanently resilient spring steel is reinforced, extra

摘要

The mattress core is made from expanded foam with spiral springs in the middle area and strengthened with robust elastic springs. In the core (5) is an intermediate area (2) with several rows of holes separated for the insertion of protecting shells (3) which fit the spiral springs. Foam plates (6,7) cover the top and bottom.