How to choose a good quality sofa bed by looking at the foam sponge in the sofa bed?
In order to improve the sitting comfort, some foam to reduce the density in the premise, do some soft processing, the vertical spring in the cushion, the sofa has higher flexibility and anti aging properties. Under normal circumstances, the human body after sitting, sofa cushion to sag, about 10 cm for the best.
High-grade sofa cushion should use density in 30 kg / cubic meter of high foam foam sponge, back pad should use density 25 kg / cubic meter above high foam foam sponge.
