Korall Lux is a five zone pocket spring mattress (every spring is separately packed in sachet made of fibre fabric) with three harder and two softer zones. There are 250 springs/m² in the spring block, spring wire’s diameter is 1,65 mm in the softer zone and 1,8 mm in the harder zone. For softening, the mattress has polyurethane foam on one side and latex foam – upholstery material based on natural caoutchouc – on the other side. Mattress cover is made of quality stretch-fabric and can be opened from three sides with a zipper.