Auditorium seat cushion is a common problem is the collapse of the seat cushion, after sitting down, the seat cushion concave will not automatically reply, many people feel that this is spring fatigue caused by the seat damage, in fact, most of the real reason is: Cushion sponge after a long time of pressure, the elasticity is weak, partly because the quality of the foam is too poor, it is easy to have no elasticity, can not provide effective support pressure.
