Important quality control
Upper layer
* Material: visco-elastic memory foam
* Color: blue, green, black
* Thickness: 40mm
* Density: 42-45kg/mm³
* Characteristics: unique thermo active properties to provide good support and excellent pressure relief.
Firm base layer
* Material: polyurethane foam 
* Color: creamy-white
* Thickness: 100mm
* Density: 40kg/m3
* Characteristics: very elastic, fire retardant and thermosetting. Sectional design works to make the mattress and bed surface fit well in diferent positions such as back-rest and knee-rest adjustment.